It looks like it would be kind of hard to clean out. I built one out fo a 55 gal. drum once. I left the drum standing up, cut in a loading door between the strength rings and a cleanout door below the bottom strength ring. I put the grate right at the bottom SR. I had to cut up another barrel for the doors so they wood be big enough to overlap. But I had built a fire pit out of the rest of that barrel so it worked out. It had a 6" stove pipe opening that I brazed on because barrel steel doesn't lend itself well to arc welding. I also added an adjustable draft beside the cleanout. I built a rack for it to stand on about 8" off the floor and sat it in a box of gravel about 3' deep. I got the origional idea from a book called Possum Living, written by an 18 year old girl named Dolly Freed back in '78. I just refined the origional design a little. If you find a copy of that book buy it if it is cheap. I have seen copies go on the internet for $50.00. I got mine in an ARC store for a quarter.
I build small woodstoves out of old 20 lb. propane tanks.The ones without the opd valves. They are just the right size for fish shantys and deer blinds,put out a lot of heat. The one in my blind has lasted about 4 years,but needs to be replaced this year.So what.It cost about 5 or 10 bucks for the materials to make a new one.