In the end, these boutique pinball companies aren't rich guys trying to capitalize on the re-emerging pinball market. They are pinheads like us, with ideas like us, and they are out there making their ideas come true. If they make a good living out of it, good for them.
A good living?
I'd say a good part of the cost of one of these games is profit
BOM for this era Bally would be about $4000, nothing for existing artwork, $1000 for labor to put it together