We just purchased an older camper and want to remodel it?

It is in need of major updating. Walls, floor, counter and cushions. I am not sure if their is someplace that has information on remodeling a travel trailer. I want to chang the color of the inside which means the walls, curtains, table cushions, couch, carpet and flooring. The sink sags and needs to have a new counter top and the floor in the kitchen sags and needs to be replaced. Any suggestion on books, magazines or internet I would appreciate the help.