I co-own a web app which makes about $70k a year total, which I split 50/50 with my partner. Living in a relatively expensive place, I'm satisfied with that fo

I co-own a web app which makes about $70k a year total, which I split 50/50 with my partner. Living in a relatively expensive place, I'm satisfied with that for now as it enables a modest yet comfortable standard of living. The usual benefits - flexible hours, can work in any location with internet access, complete choice of technologies, etc. go a long way. We could do a lot better, though and I'm aiming to do that. The current business I have can't grow due to the unique situation (it's based on another company's API, and that company is atrocious in every way imaginable - including developer hostility). It's been a blessing, though and I'm looking to build some great new stuff this year.