Is it a wafer tumbler lock on the coin door? (look in with a flashlight, and look at the brass tumbler the keyway. If it looks flat, it's a wafer tumbler lock). That's usually what I see on home use machines. If it's a wafer tumbler lock, just pick the lock - wafer tumbler locks are pretty easy to pick; there are plenty of guides to lock picking online.

If it's a wafer tumbler lock, picking is easier than drilling the lock. wafer tumbler locks are almost always trivial to pick, they're there to keep out the riffraff, not to keep out anyone who really wants in. If not wafer tumbler, drilling probably easier.