I wanted one...I do a lot of four wheeling and racing, and looked at them for the last couple of years. None of them are cheap. Only a few have a built in generator, and none had 24ft garage with an escape door and living quarters...So I got some quotes...Didn't like those prices.
The ones I finally liked are up above $50k.....
So I settled on this route...Cost a lot less, and my trailer is all setup the way I like it...