Once they decide, you can always build another cabinet......an even better one. (Another reason why I only have one.)
You will be surprised at how much time you can spend on just one cabinet. When I finally started the build it only took a few weeks. Over the last year it has been all about configuration. Sure, the cabinet plays fine but I wanted to have CP's pop up before each game. Then I wanted the buttons labeled properly. Then it was trying to match colors to buttons. Then it was sorting through the games to find "the best of the best" and the list goes on and on.