Sure, and I think that's a great plan. It's more or less what I did - I didn't make FU money from the acquisition, but enough that I didn't have to worry about it for a while while I found something fun to work on. However you're in a better position than me because I truly hated that job for several years before it unexpectedly worked out well, which is why I was willing to sacrifice a large pile of cash for long-term happiness. If you can get to being sufficiently financially comfortable while doing something you enjoy, you should totally do that.