I can help! I have 3 machines at a my buddy's small neighborhood dive bar. Its only open at night and 21+.
They have been there for about a year. We split everything 50/50. I only charge 50 cents and each machine makes about $150 per month. So roughly about $200 in my pocket each month. I haven't had any major issues. Only stuck balls and loose screws and 1 switch that broke and was an easy fix. I really enjoy having a few beers and counting quarters once a month.
I'm not making much money at all but I also don't have room in my house for the machines so if they weren't at his bar they would be in storage. It's nice to have somewhere to go play them when I want to. Let me know if you have any other questions. My games on location are MMR, MBR and Metallica.