To many options to list.. I'm in the process of building my shop & looking at Northern tool's electric ceiling mount shop heaters.
With the "mild winters" we have in Coastal SC I don't really need anything huge BUT this past week has me second guessing my thought process. lol
A decent one can be had for 80.00 & a bigger one for 150.00, just look at the square footage it heats & go from there. {24x32 shop w/ 13ft sidewalls}. You can spend MORE by getting the remote controlled units, but when the day comes that I cant reach up & turn a knob, is the day I probably should quit working in the shop..
Mine wont be on all the time.. just when I'm in there, so the electric cost will be minimal..