Wood stove would be great and very cheap because I could have all the fire wood I wanted for free.
Insurance Co. will not let me unless I have an out door wood stove. But want to take off in the winter and wanting my garage to stay above freezing and electric is best for me.
As long as it's installed properly and up to code shouldn't be a problem. Lots of guys have woodstove in the garages here. Of course maybe they aren't legal lol