I have been on $100/mo claude and it has been churning out quite good software for months now. like i estimate what would have taken me three ish years, assuming i didn't burn out from failure (i would have). i only hit limits when i double fisted claude with my main project and my side project. just the other day i noticed i had been stuck on 4.5 because i failed to update the npm package.
We're having a similar outcome. A hundred dollars a month is about right for me to sometimes hit a five hour limit, but mostly not. I do an hour or two of improvements, then go experiment with what I built and make a list of things to change, bugs to fix, ideas I've solidified, experiments I've invalidated.