Mildew in the camper. Ugh!

We live in GA and our camper is in unheated storage. There was a leak under the sink at some point and it was fixed. Then we left a window open one time, thinking it would be good to have some air circulation and I think it just was too humid. There is powdery mildew everywhere! It's all over the fabrics, it's in the wood grain of the cabinets, in the closet, on the dinette and the couch. I have already been over every wall, cabinet, ceiling, dinette and couch with both bleach and vinegar. The mildew came back as bad as ever. In my opinion, the camper needs a complete gut. Well, actually I think it just needs to be junked.

According to the NADA blue book, our camper in fair condition is worth about $5000; obviously, this camper is NOT in fair condition. A friend says he knows someone who wants to buy it for $500 to use as a hunting cabin. He knows about the mildew, so we wouldn't be pulling a fast one on him. DH (who really doesn't want to sell it at all) insists that he wants to get at least $1500 for it because "it's such a nice camper." Well, it would be a nice camper if it didn't have mildew everywhere.

As it is now, we cannot use it. I refuse to spend one night in there breathing mildew. DH has stage 4 lung disease--the last thing he needs is to breathe in mildew. DD22 insists that we could replace all the fabric covered items, sand down the cabinets and paint them, and replace the A/C filter. I am very hesitant to do all this. I don't want to expose myself to the mildew and I don't want to spend several hundred dollars (and a LOT of time) cleaning and rehabbing, only to find that the mildew re-asserts itself in 6 months.

Sooo, say you were thinking about buying such a camper to use as a hunting cabin. What would you think you'd want to pay? (and don't say you wouldn't be so foolish as to buy it. I am fully aware that this is a loss but I'm trying to entertain my husband.)