Well, that is a case for a give away
I love it when someone has one like that and they call me!
What I would do if I had no place to put it, and wanted to just get rid of it is to get some blocks at the back and half way between the tires and the front, and sort of level it up. Then I would go clean it up nice as possible, but don't fix a thing in it. It simply is not worth doing that to.
Then I would put an ad in the thrifty nickel or craigs list and offer it for $3500 or more if you aren't in a hurry, cash plus a 200 per axel refundable deposit, and only give them 45 days on the deposit or they keep the axles and you keep the deposit. set your price and then lower it about 200 per week until it sells. A guy had a torn up one but relatively nice, and sold it here last year for $5000, and actually sold it!
here is a 79 trailer of mine on craigs list but I never got round to cleaning it, a guy gave it to me for taking it, and when I looked on the title it was a 12 wide, so I sort of decided to get rid of it, I haven't really bun pushing to hard to get rid of it though, because i found a place to put it.
Anyway even if you take a loss on it, you are better off than putting money in it by setting it up in a park.
Fixed up real nice, in a park and you carrying the paper with 1000 down you would sell it for maybe 12,000, and probably get it back 3-4 times before someone paid it off. And finding a park you can work with is major trip.
But if there is a park in the area with a lot of empties, you might make a deal with them to pay some of the set up fees, and possibly give you free rent for a year or two for stetting it up in there, because economics has made parks a tough thing to fill.
one guy makes his deal with the park owner and gets free rent for the year, and collects the space rent from the buyer, so he gets his set up cost back in a year.
generally speaking it will cost about 4500 to set it up and put in new but cheap floor coverings
Selling them on contract is an incredible business if you have the stomach for it, I have a trailer set up friend that has over 100 contracts paying him over $100 month each
find more info here
But I don't like selling them on contract so haven't done much of that
May God richly Bless your day!