LOL, this is so true. I have spent so many days sweatily folded into a dark corner of the bilge fixing the VacuFlush toilet system on Grandpa's boat. The pros want 5k even to look at it, and I don't blame them. IME it is the least worst of the marine toilet systems, but still a maintenance hog. Land toilets mostly just work. Marine toilets mostly just don't.

* Though I should mention I actually like the VacuFlush, it is the least worst system IME. The VacuFlush works like an airplane toilet, with the big WOOSH, it will flush anything. Negative pressure keeps bad smells contained. The downside is finding a vacuum leak can be quite a challenge.