It will be a great space that you can temp control. Much more pleasant working in comfort! 
So true. I insulated the front wall with R30 and covered it with inside sheathing which will allow supporting heavy stuff.
I got a new 14,000 BTU portable B&D unit which is doing a good job for this space.
It’s 95 outside and probably 76-78 or better inside and dry.
No more dripping sweat in there!