For me I believe not including time the costs will be $2.5k with a new computer and high end 100hz Samsung tv that happens to be 3d capable so might be beneficial.

As for making more than one, highly doubt it though the apple store want to see it finished as it will be running via a mac mini so who knows they might want one or a few to show off in their shops 

I just want it as an alternative to play some of the tables that I will have no hope of owning and also then kids can play other arcade games as well.