I'm going to make it easy on myself and just go with a cheap inline duct fan for the exhaust, passive intake, and a small oscillating fan near the intake hole to help draw the air in. Hopefully a little thing like that won't be too noisy. Since I'm going to use 4" ducting, I'll probably just cough up the cash for a 4-inch hole saw to cut through the cabinet and make it easy on myself.If a dremmel wont work, you may need a drill with a metal bit and a pair of metal snips from your hardware store. that means you will have to cut them by hand. drill a starter hole and use the snips to cut out a hole. I traced the fan on my cab and then cut the holes to match it.
Have you decided on which fans you will go with?