2) Do you do detailing of the interior of the rv? Was unable to use the motorhome in 2017 needs a major cleaning.

I wouldn't go here. Try a detail shop. There are 2 mobile detailers in the area. That's what I'd use.

Some places have moble cleaning, look for that. I wouldn't go there.

Yes, they do.

I believe they do have detailing, call them to verify. However if you have a mold problem you may need to seek an environmental cleaning company due to health hazards.