I made my own fume extractor system for around $100 that works awesome.
Heres the link to all the parts.
Super easy to do (make sure you buy all parts w the same inches). Put your fume extractor at your soldering area a bit above it. Put on your ducting. Then add your inline booster fan (this one is strong and quiet and has a switch knob you can put wherever) add yoyr 2nd ducting, then assemble your portable air window kit and run your ducting out. Boom, youre all set up.