When are you going to step up to Google Chrome as your default browser? All the cool kids are doing it.....
I would let HIM rent the space or build the extra space for HIS toys.
I might suggest a temp. building. Buildings on skids with a ramp to the floor. That way, when he moves, he can move it with him.
what is the cost for one of those trucks with the boom they use on large buildings? Worth asking.....