You could look into renting a pin, there are places that do it. Then when you get bored, you can swap it for another one.
Virtual Pins are great, but there is a steep learning curve if you aren't great with computers. I would definitely try a high end one before you buy. Expect to spend almost as much as a NIB for a good one.
If I could only have 1 pin I'd go with something with a deep rule set.
Simpson's Pinball Party
LotR
Metallica
AC/DC
hope that helps.
By the way. Pretty much anyone who posts about a virtual pinball knows they are not a real pin, I don't think I've ever once seen someone argue this point and I don't know why every time someone mentions a virtual pin that someone has to say "It's not Pinball" etc.
A Virtual Pinball is perfect for a situation like this. Limited space. If you can get past the "It's not pinball" stigma and enjoy playing the tables as games then it would be a great choice. Then you can do all your "real" pinball playing on location and at shows. It lets you have multiple games in the space of a single pin and it get's you out of the house supporting location pinball.