I don't know what it's like where you live, but here in Boston opening a bar (because if you expect to make your profits on the liquor and food and not the games, the games are basically a non factor. you are de facto running a bar) costs you at least a million dollars. Liquor licenses, inspections up the wazoo, fitting a space, hiring staff, buying insurance... and even then a lot of bars fail. Obviously 'Bar Rescue' is mostly fictional but its a good indication that running a restaurant/bar is a HARD business to make work.

Even if someone gifted you 20 Stern games you might still have a hard time making an arcade work. Electricity costs (especially in AZ where I'd expect your A/C bill to be ridiculous), employee salaries, maintenance on the pins, insurance, rent, licensing, etc... I mean there's a reason the arcade scene died out and then morphed into something else. the traditional economic models just don't support it.

Also, have you worked in the hospitality/bar business before? That's a big part of it. If you are hinging the success of the business on the part of the business you know the least about (bar) then I would question that.