It honestly only ends when you run outta money. There's always shit that needs to be done. Fixtures you don't like, appliances you want to replace, plumbing/wiring that need to be corrected, etc. And then when you're done with that, you just start adding the stuff you wish you had but had to compromise on. That's when the bathroom and kitchen remodels start.
So yeah, as long as there's money to spend on the house, you'll find a way to spend it. So I guess my advice is "Go expensive, you'll get to rest sooner."