Don't worry about the day 1 bug. There will be 100 and it won't matter.
"You can be thousands of dollars out before you've made a single cent."
You don't need to be out of pocket at all. Getting started is so cheap today. AWS, Stripe. You're not paying large amounts unless the site is popular.
With the day 1 bug part, I mean more like if the entire thing collapses. 100% there will be bugs and they will affect a lot of people but let's hope nothing catastrophic on the first day!
With the out-of-pocket stuff, a lot of that is legal fees for things like trademarks, setting up the business structure, T&Cs/Privacy Policies, making sure I have the right sales tax in specific districts etc etc. Not everyone needs to do every one of these but I'm trying to get it all right from the get-go. 🙂
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.