Burning would be a good idea and i've got a fire marshall as a next door neighbor lives right in my front door across the road. Around here they enjoy what is known as practice runs at the fire dept I might just have them do that once everything that is any good is out/off of them. It's not like the wood is of any thick usable size if I get in a newer model trailer like from the 80's or 90's some of those had decent wall beams and floor joists. But I know for a fact the 1965 that I use to live in before getting my double wide the walls breathed in and out when a winter wind blew threw it was awful we kept colds. But the cabinet's in it was THICK sold wood so those are coming out and getting repurposed in other ways. But if any I get in are in sad shape i'll probably have the fire dept tourch them and then sift threw the ashes.