Worse yet, what do you do when you feel like your game room is perfect and you have everything you want?
You don't really want to get to this point. Trust me. My home game room is essentially there, and it has sat largely untouched for over a year now. There are a variety of reasons for this, but my new career has put a crimp on things. For the last two years it has been much harder for me to be home consistently on the weekends so I can schedule arcade parties and have people over. Also, I've been working longer hours but making a lot less money than I used to. This hamstrings my ability to change things up in the game room with new games. Hell it even makes it harder to maintain what I have and get repairs done when I'm on a tighter budget like this.
But you have to find a way. The arcade game collecting hobby is social by nature. It's the best part of it, really. When your game room reaches "perfection" and stops changing it loses its luster, both for you and for your friends, who seem to come over less and less. Also, instant gratification is overrated and anticipation -- the "hunt" -- is part of the fun. Don't be in such a hurry to get everything you want. In this hobby, at least, stagnation equals death.
