You didn't say if your extracting welding or paint fumes, but here's what I did.
For my welding bench, I snagged a stove hood from the steel recycler and vented it outside.
For paint, I got an old truck sleeper (40"), stripped it outand sealed the walkthrough with plexi. I used the 12v lights that were in it for light, powered by a small batt charger. A heater fan provides pull through ventilation. Inlet and outlet air are filtered. Outlet air is exhausted outside to prevent vapor buildup.
A carbon filter big enough to do any good is going to be really pricey.
There are electric smoke eaters that do a good job and are portable to the job with a little ingenuity. but $$$$$