They seem fine to me but they should be very, very, very, much cheaper.
I have 2 units in my yard. We have 1/3 of an acre. Both of the units are 10x12 and cost less than $6000. One has a small toilet that I had a handyman hook up for me. The other has no bathroom whatsoever. They are both wired with electricity. Both are close to our outside garage door where there is a full bathroom just inside the house. My grandson lives in one of them and the other one is for visiting family. They cost less than $6000 each! $16000 for that! These people are insane.