I have one pin in our place. There's just not enough space to set up two machines.
But...
I've got a second one on the way currently and have owned 2-3 at times previously.
First of all, ACDC is sick! It's the best game I've ever played and is such a rush, it never gets old.
I suggest you watch some tutorials and gameplay videos on PAPA.org
If you're challenged with a lack of floor space, here's what I do:
Setup your ACDC, then fold up the second pin and put it in storage somewhere out of sight.
(Preferably on the same floor, and not far away).
When you need a change, swap them out.
Keeps things fresh, without having to buy/sell.

You know what hasn't been mentioned yet?
Heighway pinball. Their first title, Full Throttle should be out around early March.
Their second title is Aliens.
The reason I mention them is because you swap the playfields, but don't change the cabinets.
You could have multiple games without too much space. (You can store at least one extra playfield/game under the cabinet while you're playing the other one)
Check it out!

http://heighwaypinball.com

Check it out.