Well, I found a beautiful used box truck for a great price and bought it.
One owner, 2013 Ford F-350 cut-away, dual rear wheels, 103K miles, $18.9K + TTT
Box is 11.5' long, 7.5' wide, and 7' high. Some mods for the 12' ladders will be needed.
The owner actually traded in three identical trucks for newer ones. Guess his business is doing well.
Drove nice, maintained by the same dealer I bought it from, Looked at the maintenance records.
Here it is. I'll be posting pictures of the upfit. I pick it up on Friday.
My only concern is the price of lumber and metal shelving. Upfit is going to be more expensive then usual.