You also need to take into account Tooling costs. This can be quite high for custom parts that are made for the machine.
Tooling for vaccum formed parts can be $2,000 - $5,000 easily.
Injection tooling is quite a bit more expensive that that, sometimes 10-20k per tool.
Some parts are then painted after molding so that is an entire other process, etc.
Pinball Circus had more than 50k in tooling just for the wireforms from the documentation we've seen. It also had at least 5 non-vaccum forming tools.
So tooling can add up very quickly. Of course, spread across several thousand machines it's a much smaller number per machine. But I could easily see $50 or more per machine in tooling costs. Possibly more.