I had several pins on location and a couple vids years ago. I did a 60/40 split plus payed for all maintenance.
Here is what you do. Go back to those places and tell them you can bring a game but only at 60/40 split. You simply explain that you need this to be ABLE to keep the machines in top shape. Tell them people will be more willing to play good playing games then they will from crappy games. Another suggestion is don't bite off more then you can chew. Meaning go slow with the amount of games you put out. You want to be able to have the time to go out and inspect your games often.