A- up to you
B - licensing to let people play, costs money. Premises also cost money. Parts and overheads cost money. Also, loads of people out there like to hit machines when they don’t win, why would somebody risk that?
C - Get buying, or visit some classic amusements. Some people call stuff from 20 years “old school” some people are talking about 40 years ago. If you’re talking about stuff from 90’s/00’s there’s plenty of places to visit