I have the over/under style (check sig).
It actually started out as two coin doors from ebay. Each had issues that the other fixed, so I combined them. Stripped the paint and repainted.
As for connection, the credit switch are the same microswitched buttons use.
For lighting, that takes some creative thinking. your power source is your computer, so you either have 12v or 5v. 5v being easiest to get externally. there are 6v lamps that work well, just won;t be as bright because they aren;t getting full power. Arcades used 3v I think.