Well a MAME cabinet and a JAMMA cabinet are going to be pretty much the same thing. JAMMA is just the standard for the wiring harness. So to simply answer your question: 
Obtain a cabinet(either build it or buy/get for free an emtpy one), 
get an arcade monitor, 
get a Power supply, 
get a JAMMA harness,
Buy your buttons, joysticks ETC.
Wire everything to the corresponding JAMMA harness wire and plug in your JAMMA compatible gameboard.
Its as simple as that!