I have a military "space heater, arctic" that was purchased surplus that was designed for a tent. With the solid fuel grate in place, it burns wood and coal. Set up for liquid fuel, it burns diesel, kerosene, and several types of jet fuel. I've tested mine with wood and diesel, and both fuels worked great. The stove is about the size of a desktop PC tower and is light enough for one person to pick up and carry. Price was under $200. Mine is getting installed in my camper as soon as I get enough metal sheet to make proper heat shields.
-CJ