How would you do it.

[jorgeinmiami]

I also did mine in the back yard because I had the space, but doing it on the trailer is very possible. Worst case is that you put it on stands/bricks and have a buddy hold on to the trailer for a few days.
The worst part it sanding/getting off the bottom paint.
if you can at least get it preped then you have done the hard part
The rest is easy