I would try to sell, I was talking to a guy who had 20+ flat bed trailers. He was removing the wheels and stacking them to go to the yard when someone came in and asked if they were for sale.Guy pulled out a wad of cash and bought every single flatbed. The owner said he easily doubled his money.
So if you can post it for sale, i would try that.



Otherwise, torches are your friend, but 15K is a lot of weight, Will need a couple dumpsters at least.

Sounds like you could be in over your head, but it is a great way to learn.