I think you need to get your business idea clear from the start as the purpose is to make money for you, full stop.
It seems to me that there are two ways of doing this:-
1. Hire out new, modern motorhomes to people that want comfort and aren't bothered about the VW scene.
2. Hire out older classic vehicles that let people live the dream in a classic old VW bus. People that like the image basically.
IMHO a T25 meets neither of these.
Most peoples idea of a classic VW is a bay or splitty and not a T25.
You have to remember that other people (the public/your clients) that don't frequent this site and similar probably don't appreciate the T25 as we do.
You may have a client base with people who are considering buying but it sounds a bit limited.
You've probably thought it out better than me already and I am probably entirely wrong. Wouldn't be the first time.
Good luck.
