Hi Apollo, I am the friend Thumpa is refering to. I have 2.5 mame cabs at present. My first is a single stick, 4 button vertical machine that has cost me less than $100 (plus PC Pentium 233). I'm running Arcadeos and dosmame. I made two boards. One for converting the joystick & Buttons for the PC games port and the other to combine the video syncs and turn the signals to the 19" arcade monitor on/off (this is controlled by arcadeos). This is great for single stick, 2button games, ie Galaga. Everything is controlled by the 4 buttons (game select/exit etc). Event the coin mech works. I first gutted the cab, remade the base and coin box compartment. Painted it black Rewired it, Replaced all of the locks and through a Pc into it.
My second cab is a MAME32 job. It has a 19" PC monitor (RGB input). I made the stick converter for the games port and a VGA to RGB converter. Monitor, Console and Cab were free. Put in new light, Stereo speakers, new locks, fans in the back to keep the monitor coolish, new base and wheels. I don't have a PC inside, Instead I have a socket panel at the back were I plug in an external PC (Video, Audio, Games port). Plays all horizontal games very well. Vertical games aren't too bad. Cost to make? about $30 if that
The 0.5 cab is in progress, but that is going to be a 2 stick 5 buttons per stick machine.
All my machine are built without spending too much money.
Coincascade is a good source of bits and pieces, but not monitors. Speaking of monitors. Some 25" monitors are medium res. So if you are going to use the video card that Thumpa used make sure your monitor is low res. Could be an expensive mistake.
I have a 25" med res monitor if anyone is interested. Vsyncmame can be setup to output med res freq with the right video card. If anyone has a good 19" low res monitor for sale I could be interested if the price is fair