I have a DIY booth. About 4' square up to the ceiling. Wooden framed and covered in acrylic. I started with a bathroom extractor fan in the ceiling. It was the most powerful one my builder friend could find but it was useless. I took the fan out and replaced it with this 14" one (see link). I got a decent one as I didn't want to replace that too. It has a filter over it to keep it clean. My advise whatever you choose would be to put it in front of you, rather than the ceiling. https://www.ebay.co.uk/itm/NEW-POWERFUL-INDUSTRIAL-COMMERCIAL-HEAVY-DUTY-METAL-EXTRACTOR-EHAUST-BLOWER-FAN/401388344398?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649