Neither is mine, I wear more clothes in winter...
At least y'all have a garage.....now you know why I work on stuff in my kitchen. .... I just got through working in a back yard apartment kinda thing.... anyway- basically a 2 car garage space. I have a turbine heater- 55/70/100, 000 btu IIRC, that runs off propane. On high-it uses so much propane that a 20lb. tank freezes up and has to be shook and turned on it's side after a few hours. But the heater itself was only about $160- but that was 10 years ago. Still- I think today they are only about $200ish.
I only ran it 3 times today for less than 10 mins. per session and it got so warm in there I
had to turn it off.
Long story short- get one- you'll be kicking yourself for not doing it years ago.
BTW- It wasn't extremely cold today- but the temps were sub-freezing and it would have been impossible to work without it as my air compressor and nail guns would not have functioned at that temp.