That's where these oil burners are better.
Unlike the barrel stoves you just shut off the oil
1/2 hour before you want to go home, the flame goes out after about 5 min and just let the rest cool down.
Much safer than a space heater because it's very hard to set fire to yourself as the flame is contained, you can't trip over it and you can't knock it over.
I remember calling at a friends workshop only to find him passed out under a car!!!!! The space heater had filled the space with CO2!!!!! He just felt a little tired!!!!!! Then a few weeks later he drove his tractor into a wall again after spending time in the workshop with the same space heater!!!!!This time he just felt a little sick!!!!!!
There's loads of ideas on You-Tube, have a look
A man of your calibre could build one is a few hours.
The only problem is it does take a while to fine tune it to burn hot and clean. I still get a little smoke but have ordered a 100mm flue pipe which should sort the problem out.