Why not partition off an area and put a ductless unit in the wall. That way you would have a comfortable area to work. I did it in what I call my storage area, when it scotching outside I retreat to there and find something to do there.
I covered this area pretty good but I’ll add a few things. One thing I found out working in a steel mill is you have to condition yourself to heat so you can handle heat. At 68 years old if I didn’t expose myself to heat at home how am I going to go to the races and be in it for 2-3-4 days straight. Standing on black asphalt even on a 85 degree day takes conditioning especially as we get older. Climbing in a race car with a 3 layer suit on doesn’t make it any easier. Now cold makes my bones hurt more than they already do. Radiant heat in the winter feels great.