Responding to your comments.
I personally find the marquee and sideart worthless. The Ultracade logo is ugly and generic. If it were nicer I'd be more impressed.
The price estimates I've given are accurate. If you wanted to use all of those pc specific hardware add-ons then yes it would cost that much, but that's like comparing apples and oranges. I'm talking about how much a similar multi jamma system would cost, or even a pc running mame. All of those things you mentioned aren't required to make a mame machine, they are nice but not required. And for the record yes, a pc as powerful as the ultracade system would probably only cost 150 bucks. You only need like a p200 mhz with a 500 meg harddrive to run all of those games if we are nit-picking.
About the pcbs on ebay... these particular games are very robust. It's actually rarer to get games that don't work, in these particular cases. And if you are leery of ebay you can get most of these games at any online arcade store. Most run approx 20-30 bucks even then. Like I said, 20 bucks a game is on a bad day.

About the jamma switcher.... I never mentioned using it in an arcade environment. As a matter of fact I specifically suggested it for home collectors. And how is a mame setup not worth it for collectors and home users? Your going to have to explain that one to me as mame is... well free.
Also about the conversion thing... I know distributors are cheap, but they aren't going to put a 1000 dollar system in a pos 25 dollar cab. They are gonna want to put it in a brand new one or at least a used one in really good shape.
And to finish off I don't know how well the arcades do where you are, but around here anyone that can actually afford to stay in business is constantly packed due to the lack of arcades in the united states today. So the 30 vs 2 point is definately not moot. For convenience stores, like you said it might be a good idea. In arcades, not really. Also you pointed out that it greatly depends on what people want to play. As much as we like classics around here, the average 13 year old isn't going to fork over 50 cents a play for 1942.
I didn't want to get into that aspect but considering you think it'll be a profit goldmine and around here the ultracade machines are literally the only machines collecting dust I could really disagree on that point.
I'm not trying to argue, I just don't think you understood some of the stuff I posted and you didn't research it as carefully as I did. (Tallied it up a loong time ago when the ultracde cabinets first came out) I just want to get the facts out. Unfortunately, the more I go over the facts, the less appealing the Ultracade system is to me.