Are you really going to have room for 8 machines over there, or any for that matter? My experience in Europe says no, but I didn't live on a base or anything.
Belgium is in the middle of everything in Europe and there is so much to do you shouldn't waste your time playing that much pinball.
Sell your games, put the money in the bank. Buy them for a lot less when you get back. In the mean time, if you get over there and have room, buy a machine or two and leave them there when you come back.