I use a heater just like the OP linked to in my workshop, which is a garage 20x24 with insulation in the walls, but none in the ceiling.
I am not sure of the tank capacity, but I can usually fill the tank about three times from 5gal of fuel. It will burn a tank of fuel in about 10 hours.
When the outside temp is 35 or above, it takes over an hour to get the inside temp to 60 degrees. It will keep the inside around 65 during the day, but that is about it. It doesn’t really heat the place well, but it takes some of the chill and moisture out of the air and I can work in short sleeves without too much trouble. I don’t see how it could warm 1000 sqft much at all.
I burn regular (K-1 ?) fuel, and the unit produces no smoke. If you work around it a lot, you don’t notice any smell. If you leave for an hour or so and come back, when you walk in the shop, you will notice the smell from the heater, but it is not strong or objectionable.
I buy my fuel from a fuel place that pumps it out of a big tank. Costs me about $7 a gallon. You buy a 5gal pail from Lowes and it is about twice that.