The Side Hustle Mistakes That Cost Me a Year of Income

Before I figured out the Etsy thing, I tried three other side hustles. None of them worked. One actively lost money. One nearly destroyed my relationship with my then-boyfriend. The third, in retrospect, was kind of insulting to my time.

I want to walk through what each one was, what went wrong, and the pattern I now think connects all three. Not because I'm trying to talk you out of starting a side hustle — quite the opposite. I'm trying to talk you into starting the right one, by helping you spot the bad ideas before you've spent six months on them.

Mistake One: The Print-on-Demand T-Shirt Store

The first side hustle I tried, in 2019, was a print-on-demand t-shirt store on Redbubble. The idea was that I'd upload designs, Redbubble would handle printing and fulfillment, and I'd earn a royalty on every sale.

I spent six weeks designing t-shirts. I made approximately 80 designs, mostly puns and teacher-themed jokes. I had spreadsheets. I had a content calendar. I had set up social media accounts to promote them.

In year one, I made $43.

In year two, I made $61.

The total revenue across two years was $104. Redbubble's royalty structure meant I took home around 18% of each sale, so my actual earnings were about $19.

I spent, on a conservative estimate, 80 hours on this project. That works out to about 24 cents an hour. The minimum wage in Oregon at the time was $11.25.

Mistake Two: Dog Walking Through Rover

The second attempt was Rover. The idea felt simpler — sign up, get matched with neighborhood dogs, walk them, earn money. People need their dogs walked. I like dogs. Done.

What I had not factored in was that the local market was already saturated with retirees and college students who could walk dogs at 11 AM on a Tuesday. I, however, was teaching second grade between 8 AM and 4 PM. The only walks I could take were before 7 AM or after 5 PM.

In the three months I tried this, I got matched with exactly two dogs. The first was a beautiful golden retriever named Banjo. The second was a deeply anxious labradoodle named Olive who tried to eat a squirrel and pulled me into traffic.

Total earned: $94. Total injuries: one bruised hip from the Olive incident. Total trips taken: nine.

What I had not understood about Rover was that it's a network effects business. The people earning real money on it have hundreds of completed walks and a long review history. Starting from zero in a saturated market is hard. Starting from zero in a saturated market with constrained hours is approximately impossible.

Mistake Three: Selling on Poshmark

My third attempt was Poshmark, which is essentially Ebay for clothes. The plan was to "thrift flip" — buy used clothing at Goodwill, sell it for more on Poshmark.

This was the one that nearly destroyed my relationship. I was, for about four months, dedicating most of my weekends to driving to Goodwills around the Portland metro area, hunting for resellable items. Then I'd come home, photograph each piece, list it, manage the listings, ship them.

My then-boyfriend, who was very patient about a lot of things, was less patient about coming home from work on a Thursday to find sixty pieces of used clothing spread across the kitchen table being photographed.

The economics looked good in theory. A $4 thrifted dress could resell for $25, after fees and shipping the net would be about $14. Sell ten of those a week and that's $140.

The problem was the time. Each item took, on average, 25 minutes from sourcing to listing to shipping. To net $14, I was investing nearly half an hour. That's $28/hour, which sounds fine, until you realize the time also included gas, parking, the emotional drain of haggling, and the fact that about a third of my listings never sold.

I quit Poshmark after about $1,800 of revenue, $1,100 in net profit, and what felt like a real strain on my home life.

The Pattern I Eventually Saw

It took me a while to see what these three failed attempts had in common, but it's pretty clear in hindsight.

All three had no compounding. Every dollar of revenue from Rover required a fresh walk. Every dollar from Poshmark required a fresh thrift run and a fresh listing. The Redbubble store was theoretically compounding, but the volume was so low it barely counted. None of them had the property of work-now-earn-later, which is the magic of a real side hustle.

All three had a marketplace problem I hadn't analyzed. Redbubble's market was massively oversupplied with designs. Rover's market in my area at my hours was undersupplied with dogs. Poshmark's market was fine, but the time-per-sale economics didn't work for someone with a full-time job.

All three required ongoing time proportional to revenue. This is the killer pattern. The good side hustles have a leverage point — you create something once, it sells many times. The bad side hustles have you trading hours for dollars at a worse rate than your day job.

The Test I Now Use

After those three failures, I came up with a rough test before I start anything else. I ask three questions:

Does the work compound? Will the hour I spend on this Sunday generate revenue six months from now without me doing anything more? Or is it a single trade — hour worked, dollar earned, done?

Do I have an edge in this market? Is there a real reason I would do better than the average new entrant? Local knowledge, an existing audience, a skill few people have, time-zone advantage, anything? If the honest answer is no, I should not enter that market.

Is the time-per-dollar reasonable in month two? Not month twelve — month two. The first few weeks of anything are slow, but if the work itself is structurally low-paid (like Rover walks at $15 per 30-minute walk), it will still be low-paid in year three.

Etsy printables passed all three. The teacher resources compounded — I made them once, they sold many times. I had an edge as an actual teacher selling teacher-things. And by month two, I could already see that the per-listing time, while substantial, was paying off across hundreds of future sales.

What This Cost Me

If I add it all up — Redbubble, Rover, Poshmark — I think I spent something like 350 hours over those eighteen months of failed side hustles. I earned about $1,300 across all three. That's around $3.70 per hour for a year and a half of evenings and weekends.

What I really lost was not the dollars. What I lost was the eighteen months of evenings I could have been putting toward the Etsy thing earlier. If I had started Etsy in 2019 instead of 2022, I would today be three years further into compound momentum. That gap is real money.

The Lesson

The thing I wish someone had told me in 2019 is that not all side hustles are equal, and the framing matters more than the effort. Working harder at the wrong side hustle for a year will earn you less than working casually at the right one for a month.

The right one, for you, will probably involve something you already have an edge in. Something that builds inventory or audience over time. Something that pays better in year two than in year one.

If your potential side hustle doesn't have those properties, the failures aren't going to be your fault. The market will simply decline to pay you what you hope it will.

Pick differently. Save yourself the eighteen months.