Hey Tim,
I will be buying an enclosed 6 x 10 or 6 x 12 in the next couple of weeks to tow a load of stuff back from CA. I'll need it for storage for a couple of months and could then turn around and sell it to you for a decent price.
The ones I am looking at are in the $1700-$2000 range, not sure if this is in your wheelhouse? Sounds like you may want a utility trailer, but thought I'd see what you think.