I have posted this in past threads.
When I had an apartment over a shut down bakery I used kerosene and propane for my heat, when bakery was working it provided heat so apartment had no heating system.
Kerosene tower heaters were used if I was going to be there long term. Could warm up the kitchen, living room, and bedroom just fine. I did not use fans to make temp even in all rooms.
Propane buddy heaters were used when I would be there short term.
I shut everything off at night, I like sleeping cold and east tn does not have really long term cold. Several nights below freezing but still not that bad.
Get up in morning, buddy heater in bathroom and if not leaving right away a big buddy heater by the computer for time I was going to be there.
When coming in from work and going to be up for several hours it was worth firing up the kerosene heaters.
I don't know cost of kerosene around here right now but it has gone up in price a lot from when I was using it to heat that apartment.
This year I am renting a place on natural gas but I still have all my kerosene and propane heaters so I have plenty of backup if I have issues with natural gas.
I like the kerosene heaters sold new or an older one that was cared for. I like the tower kerosene heaters, the rectangular ones disagree with me.
If you buy a new one now watch for used ones in the spring. Every place usually discounts them in the spring and lots of folks sell theirs in the spring as well.