I've been trying to come up with a "trick" for some time now. "Ideas" so far have been:

1) Create a members club where several pinheads could store some xtra machines and store them in a location that several members could access and play.

2) Storage facility that has electrical hookup (and enough area to shop the machines)

3) Retail establishment that has not rented out in a long time (and does not require you to be open)

4) Store at friends houses (mentioned here several times)

5) Constantly rotate them out at a place that will shop them (and that usually takes a long time because they are always backed up)

I'm really interested in hearing any other ideas, as this is a great topic!