I bought a DE Star Wars in 2009 for my kids. I was initially worried about the maintenance, but that actually became my favorite part of the hobby. I bought several restored/HUO games in the beginning but now I only look for machines that need some work. Any technical problems I have encountered are usually resolved within 30 min after posting a question here. As long as you can solder and use a multimeter ( neither of which I could do in 2009) don't worry about keeping things running. If you like to learn new things and take shit apart it is a fantastic hobby.
I too have a game room that can comfortably hold 4 pins, but somehow I now own 8 with another one on the way! Be careful!!!