As a solo founder of a SaaS launching next month, I tracked my time and am at 1350ish hour in the past 10 months. This is my first startup so I made some mistakes along the way with future creep so deadlines got pushed. I worked around 35 - 40 hours outside of my full-time job a week. Felt really burnt out so skipped one month of work 3 months ago but finally trying to get into the mindset of sales and marketing.

I do think though this is all entirely dependent on the scope of your project.

so you've been working 80 hours a week for almost a year now?

This is the norm in any high-growth startups, or at least it was for me. A few people seem to fall into things that don't require working all the time, but 16 hour days and two day weekends seem completely normal to me now.

Yes. Here is to hoping it starts slowing down now that the development is done and I can automate some of the sales/marketing process.

I think it just depends on the kind of product you're building. It sounds like you were tackling a fairly ambitious problem, so maybe it couldn't have been done by one person.

I've been working on a small bootstrapped service. There have been some long hours, but nothing too crazy. I've also taken a few breaks to do some contract projects (I'm actually looking for a new project now, and you can find some links in my HN profile.) I'm working on a fairly niche product, so I think I can afford to go at a slower pace and not have any cofounders.

Sometimes a startup idea does require a team and some VC funding. Those ones are far more risky and have a lower chance of success, but it's a totally different game.