Here in Las Vegas about 8 years ago they were taking the smoking lounges out of the airport and it became known that the Department of Avaition was looking for proposals to fill the space. Being young, and full of piss and vinegar, the LVPCC considered putting pinballs in these spaces.
We decided not to for several reasons. First was the hassle of getting in and out of the airport as a vendor. Having an I.D. badge, waiting in line to have your truck searched or eyeballed and then marching with tools to remote terminals.
But the main problem we had was with the poor quality of current production NEW equipment. It is one thing to replace brand new coils because a substandard lug snapped in half in an arcade setting where we are already there with tools and parts waiting. It is vastly more expensive to send a human and a truck at 65 cents a mile and 15 dollars an hour because corners were cut athe factory to save PENNIES in bill of material. (Even if volunteers are not paid, their time has a value and must be factored into any consideration.)
Another large problem is the lack of flexibility of the United States current coin payment system. A quarter just does not buy enough of anything these days to make many new pinball ventures pencil out. Putting in mulitple coins to get to a realistic price for your product is bothersome to the customer and time consuming for the operator. WE NEED A DOLLAR COIN THAT WORKS...SOON! Sure, we could go to bill validators on the doors or swipe card systems but these are both much more expensive to install and prone to failure.
Also a huge problem is an unrealistic reveune split of 50/50. This might have worked long ago when equipment was, even adjusting for inflation, much cheaper. Black Knight cost 2345. Black Knight Sword of Rage is 6000. Do the math.....
I have many fond memories of playing pinball at the Airport in Michigan as a twisted youth. I know for a fact that people waiting for a plane would LOVE to waste time and money on flippers. They are a classic captive audiance. Until the economics improve, it does not seem likely.