Have a chance to purchase a Rockwood 2280 in pretty good condition. It has a toilet and shower, canvas is in very good shape with one small tear in the inside tinted piece. It's a 2001, and has been used less than 2 dozen times. The guy i'm buying it from is the original owner. He wants $2500. I'll need to replace the door and the cranking mechanisim as soon as Its brought home. Is it worth it?? I've never owned a popup before, where would I buy the replacement parts?