I built an exhaust table to be able to airbrush with toxic paints. Mounted two 400 cfm fans under the table and vented through the wall. I went with Tjernlund fans after I saw a demo on you tube. https://www.amazon.com/gp/product/B005XNNYMU/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 The fans are currently $90 each on Amazon. They are 6” inline duct fans, vented independently out the wall. More bang for your buck w an 8” 460 cfm at $85 or a 10” 870 cfm for $156. Like people said you’ll need a fresh air intake too.