i wouldn't go with a trigger stick if your worried about price. i'd get a good 8-way arcade stick and a couple of buttons. that's how most of those games worked in the arcade anyways, and it should end up being cheaper and easier to work with than a controller/pc joystick.
look over ponyboy's thread in the buy/sell/trade forum, he's got awesome prices and fantastic service. look over at retroblast for reviews of joysticks.
as for monitors, i think your gonna have to bite the bullet and get a monitor from somewhere, either an arcade monitor or an old pc monitor.
good luck, and realize early that this hobby is expensive.