Jesusgatos; you really got your stuff together;
I remember my father had a booklet about american "Rolling Homes", really nice setups on trucks and busses from the 70s.
Lot of people lived in them and for quite a few, like carpenters, it was at the same time a showpiece and advertisement for their work.
Maybe I'm obstinate, but I want to return to the "shelter" idea, because nobody ever mentioned it - maybe with good reason, or maybe they just are not common over there - here they are used quite often in expedition type trucks.
I post two links I've googled; don't know if those wouldn't make a nice cabin, too, $-wise to expensive may be, but the tranportability might be an advantage. They also have better structural integrity than a normal camper, if you want to venture from the road.
and here a link to a truck whose drivers visited me in New Delhi, coming from Austria - in German, but pics are interesting I would asume
click left side on "Fahrzeug", click also on the "Hannibal" link then