Tell us more about your arcade setup, how you got the parts and threw it together, and so on? Is this something attainable by someone on a budget?
Well, as of right now all I have connected to my cab is the video output fro the tg16. Although sound and controls aren't hard to do, I haven't done them just yet. Basically I tapped the Red, Green, Blue, Sync, Ground, Audio Left, and Audio Right from the expansion bus internally, and routed them to a 8 pin din. From there I made a cable to plug into the red, green, blue, sync, and ground inputs on my arcade monitor's chassis. I took the sound and routed it to rca panel jacks and plugged a rca cable into the panel and then into some speakers. (only temporary, I will plug into the cab's speaker eventually). For controls I just plugged in a turbo stick into the tg16 (again, only temporary). I will eventually get a 8-pin din or whatever the controller plug is and wire up the controls to the panel. Although for multi player, I'd have to have a turbo-tap in there and then two 8-pin din cables. Another thing I will do is put a switch on the voltage in on the exp. bus and power and route it outside my cab so I can power the system on without opening up my cab.
If you already have an arcade cab its as expensive as the cost of solder, some 8-pin dins, a molex connector (for connecting the lines to your monitor's inputs), a switch, and some wire. So to answer your question yes it is something attainable by someone on a budget, assuming you have an arcade cab.