It would help to know what you intend to do with it. Are you looking for a weekender RV or full time live in it. Are you just planning to run around your region or coast to coast road trips. How many people and pets and toys do you plan to take with you. Will you be towing a vehicle or trailer. Are you looking for the rugged off grid experience or do you plan to stay in campgrounds. These and more are factors in deciding the right bus for you if a bus is even right for you at all.
Please do also fill out your profile so we can know more about you and help.
What Sehnsucht said is spot on...we need LOTS more information about your plans and needs and hopes and dreams. Sometimes the best bus is something completely different than a bus. For example, I've spent some time lately with a forum member who decided he really wants a medium duty ambulance for his needs...which include some off-road capability for just himself. Tell us more and we can help out!