I grew up behind the bowling machines. My dad was a bowling machine mechanic and worked on machines all around the midwest. He often moon-lite as the on-duty mechanic during league nights and I'd go with him.
Mostly he worked at the local 16-lane alley with ancient AMF machines. The logic was all relays in a "chassis" on each machine. Relays would fail, pins and balls would end up where they're not supposed to be, folks would roll the ball into the sweep. All kinds of stuff. As a kid was was fantastic to see. A pinsetter machine is a real Rube Goldberg type contraption. Probably lead me to being an engineer.
We had the several opportunities to buy a small-town bowling center, but looking at the economics -- even back in the 1980's -- wasn't good. Most of the operating profit back then came from alcohol sales and that's a totally different business.
Good luck! Recently Facebook has been showing me a lot of bowling content. Be cool if it's making a comeback.