One thing to consider depending on your location and how it might work is a digital jukebox. I installed a Rowe NGX mini last October and it has been amazing. Sometimes the jukebox alone will out earn all the pins. Of course this is a bar/restaurant and the customer base that is interested in the jukebox may not cross over with the pinball customers. And since you have people coming to your location to play pinball, not drink and listen to music, it may not make sense. But if you think it might work, it is easy money. It could help with the ambiance and retention of customers. People like to be able to play their own tunes when hanging out and relaxing.
The jukeboxes aren't cheap, around $3600-3700 plus tax, plus AMI takes 20% for music fees, there are credit card fees, and mobile app payment fees. And you don't own the hard drive with the operating system and music on it, you have to send it back if you quit operating the jukebox effectively making the thing a $3600+ paperweight.
Of course you'll have to have the foot traffic to make such a thing worthwhile. If you're only seeing 10 people a day max, I can't imagine the jukebox would earn much. But if you get the location to the point where you're seeing pretty decent traffic, it might make sense.
