Update.
I ordered game room solutions kit with sanwa sticks.  I used a raspberry pi 3 - retropie.  I used it that was just to get it up and running.  Now almost a year later I finally spent a weekend working to make it look much better.
Phase 1 completed - just get the thing running.  I did that right away.  As stated above.  Just for the money curious folks out there, I will keep a tally going.
Partially finished cab with monitor - $100
Rasberry pi 3 - $40
Button/Joystick bundler $105
Total for a working system - $245
Phase 2 rebuild the control panel.  A coworker cut 1/4 ply along with small 1x2 for framing it.  I went to lowes and had some plexi cut.  I also had bezel cut from the sheet and marquee; for next phase.  I bought mario world poster online. 
I picked a button layout from slagcoin.  I printed out the size I wanted and taped it to the panel.  I mounted plexi with holes in four corners.  Then drilled the rest of the holes using step bit.  First time with a step bit. It was much easier than I thought.  I know a lot of panels are from 3/8 or 1/2 particle board.  But, for me, framing the 1/4" play and overlaying with plexi made it easy to work with and plenty stiff.
I wired buttons, joysticks and LEDs.  Then I attached to the cabinet with a hinge.
I also attached the power strip to the back.  Before it was just sloppy.  Cleaner look.  A bit more pro looking.
I mounted the pie to the cabinet using velcro strips.  Before I just let it hand inside.  Very ghetto I know.
Step bit - $35
Plexi - $55
Artwork - $10
Mod Hodge, hinges, velcro and fasteners - $30
Total at this point - $375
So that is where I am at this point.