Gutting the bathroom on the rental house in Mountain View. That was not fun, not done well, and cost what I used to think was a small fortune. But I'm sure it helped the contractor a lot who put so little in and got so much out of the job!
It is not good to complain about having stuff, because the majority of the people in the world have next to nothing. In America, we've reversed that and instead of living to get by: we pretty much live and work for our stuff.
In the case of rental property it is even more unseemly to complain. Because owning rental property means, in the eyes of many, that you have wealth. I find that pretty close to hilarious these days, now that I inherited some "income property" from my father. In fact, I've decided if I ever get to live my life over again, rather than own rental property I would rather sleep in my car. In Mumbai.