I guess things have changed since 1997, but then motorhomes and caravans in Spain were very inferior, especially compared with those in USA where I owned a 30 footer for 6 months. It was an ‘entry level’ RV (recreational vehicle) costing 75,000 USD as almost new.
At that time people using motor homes / caravans in Spain were looked at as gypsies pr worse.
I would look at other alternatives, like importing but I understand that can difficult and expensive.