I'm looking at doing this same thing although I work for and have access to a full shop. I'm actually looking for others to work with on a combined-effort custom pin.

I have I can 3D model, 3D print, CNC ramp bucks, Vacuum form, weld, water jet, laser cut vinyl print, automotive paint booth, full wood shop, mold shop and silks screening all in-house.

What I can't do is program the game driver boards. I think that the total cost of the mechanical parts, leds, lamp sockets, driver boards, etc. would probably run about $2000 to $3000 depending on how much you do. The cabinet parts and hardware is minimal by comparison to all the electronics.

LOL. I just read my post from last year.... Man was I WAY off! If you are purchasing new components instead of stealing from donor machines or buying used, for a modern style machine, consider the costs to be more like $6000 to $8000