Something to consider is that a portable toilet allows a trailer to be issued a Permanent Trailer Identifying license (at least here in California). If the toilet is installed and not portable, the rules for trailer licensing may not be the same. (Rules change and licensing gets more expensive in California, if the toilet is installed.)
People considering these types of toilets might want to check with their state's DMV to verify what their state's rules are for these.
...Just a thought....
or a ruined toilet.
