Paul,
Dig a hole it's much cheaper. there's a picture of one in my gallery....
Seriously though storage and car stacking and basic servicing (
oil change etc)a drive on four post is perfect. For serious working on the car suspension and brakes etc a two post, clear floor 4 arm chassis hoist is best.
I'm with Harry, check out the Quakka and the Sunday paper there are always a few for sale second hand.