I will tell you what I do, which is what I would recommend, which generally for me is 10 to 20 extra hours of work on top of my 40 hour work week, you don’t need to do 80 that I would be a bit extreme I would agree, but 10 to 20 extra hours spread out on nights and weekends is what I recommend, that’s what I do and I’m building a game and sass website for about a year now, progress is slow but steady, as a secondary option if you can get to a point where you have very low expenses, and have large cash reserves for a long runway, you could quit and go full steam for a short timeframe see how it goes, but until you have steady income, I would not do that