So the thing I hate the most is the smoke/dust and smell from cutting. As you know, all welding/plasma extraction filter systems with any real CFM are crazy expensive. My first 2 modifications/ add-ons will be a custom-made extraction hood that can be ceiling or wall-mounted to help trap the rising smoke. it will consist of 2 sheets of .063 aluminum ($140) which will do the hood and brackets. I will weld all seams.
With 2 additional sheets ($140) and the leftover from the hood, I will fabricate a mobile extraction cabinet with a 5 stage filter system to collect, clean, and recirculate the air back into the shop. it will double as a welding extractor as well.
My total budget will be $900 including the ventilation fan, filters, and all other necessary parts.
Below are the conceptual drawings for the hood, less the ducting. I’m designing the cabinet now. Oh, i will cut this on the new XR.