Would much prefer to have a properly designed and built holding tank system than a human litter box onboard. Gross
I going to comment on this even though it's serious thread drift into compost heads.
Let me backup and say that my refit/restoration is well past the value of my boat so my choice of a compost head has absolutely zero to do with cost. I'm also very familiar with working on heads of all types -, my first head project of consequence was 1994, almost 30 years ago including buying a new Groco K, one of the finest manual heads ever produced. That was many, many head system repairs ago, all using the best quality products and materials available at the time.
I've also spent a lot of time on ranches and farms and on off-grid locations. I've been composting home kitchen products for years. It's just not that unusual. Yea, there's an ick-factor, but nothing like replacing a macerator pump or clearing a clog or replacing hoses. These are serious ick-factor projects that take a substantial amount of bleach and a couple showers to clean up from.
The last straw for me was when I was 2 days from heading from San Francisco to Ensenada 2 years ago to be fine my refit. My overboard macerator pump failed so I ordered a replacement. It would run but not evacuate, then die. I was convinced it was an install issue. I broke open lines looking for blockages. Re-ran power thinking it was a wiring issue. Chased down a replacement breaker. Reran heavy positive cable. Replaced hoses. Everything. In the end, if was a DOA macerator pump. No idea why, but it would run, then trip. Some sort of faulty overhear sensor I suppose. But with a couple days to go, that's how I spent a weekend.
Look, I totally get that compost toilets aren't for many (most?). My best friend who loves all other choices I've made thinks I'm making a huge mistake by going compost. I'll admit that of I had guests aboard regularly, it would be a bad idea. But the idea of predictably emptying a pee-bucket every few days trumps the BS scramble I've done for years trying to keep my head system operable.
To each their own. I'm fine with a litter box. I can't tell you how many times ive been in wilderness areas or third world countries. I guess if all you know is the modern conveniences of America, it's an unusual solution. To me, makes perfect sense. Very little to go wrong. Scan the messages on TF and you'll see many that hint at head system issues. Response is always "design or install issue". Sure seems like a lot of design and install issues out there. I'm thinking they are fine KY systems. Good riddence.
Peter