I’m on the same boat Ken, I got a double stacked open trailer. I’ve a friend that can weld and doing the math the other day, with about $200 you can make it an enclosed trailer (of course, not 6-8 height, but enclosed enough to lock everything inside.
I’ll do it, I can send you pics of the work how we progress, if you want. It’s the best and cheapest option before jumping into a enclosed 2-3 k trailer.
just my 2 cents.
Good luck with whatever you do.
I wish you twice as much of whatever you wish for me. : )