Mike,
I did get a 40 footer a few years back for $2,300 delivered and set up. That is located at my river lot and it is FULL! Got a four wheeler, golf cart, two riding lawm mowers, two toilets, a concrete mixer, roto tiller, 25-30 2"x6"x12' boards, three RR jacks, ladders, grass seed spreader, tools, table saw, 20 overhead bay lights, fishing poles and set lines, water pumps, tents, screen porch, junk, junk and more junk!
The 20 footers are going for more than the 40 footers are and I assume that is so because of market demand. For my location (my original home lot) the 20 footer fits best. The concrete pad suits it just perfect! Would really like to have the additional space of a 40 or 48 footer, but it doesn't fit the property, at least not for a permanent addition. It would be difficult to get a 40 footer into the lot because of the trees and angles to turn around. Probably could manage it, but I don't think I want one that big in the yard. If I could pour a pad for it, then it would be OK. But that would mean a permit. This way, I don't need a permit.
RADAR