The most important part is the chimney -- has to be insulated where it goes through the roof in case it gets really hot, you get the picture
Best deal by far is the convereted 55 gallon drum -- you get a kit, takes 3 ft long logs, best in my opinion is the old school "pot bellied" because it is the most efficient, but only uses scrap wood, broken branches, etc -- truth is, a one log fire will heat a basketball gym, if it doesn't something is wrong
My little backwoods church has two stoves dated 1845 -- if we used both, we would have to strip down, even on the coldest days. They have has stove pipes (or flues) that start in the back of the church and go to a chimneys next to the alter. When we use one, the air circulates in a big circle counter clockwise circile, which is why it is so efficient; the rotating air cools the long flue.
You also need to think about the distance to the walls -- in the old days, the stove went in the middle of the first floor which was typically one room (rising heat heated bed rooms upstairs overnight). Modern stoves emit no heat, and therefore can be near the walls, but they emit no heat (making them useless). They are actually considered more efficient for this reason by government experts. Back in the day, asbestos boards were used to protect the wood walls of the house, but asbestos causes silicosis. I often see that large-ish lightweight concrete "tiles" are used to face buildings, they are so light they are like paper mache' -- that might be a solution if the middle of the floor is unavailable. I would put an air space behind them, and face the wall with a reflective material such as aluminum foil.
I would also put a waist-high fence/gate around it if kids are running around (being today's kids are all high on suger, Ritalin and other prescribed or added chemicals (not to mention the effects of the TV which should be put on craigslist asap). You will find that children automagically return to their aboriginal roots as soon as the first match is lit, and then go into deep medication when the coals begin to glow. Mark my words!
Finally, this effort is feeling conclusive, which I hoped for from the outset 2+ yrs ago. With the discovery of the socialist emergence from the "Jewish settlements in the Pale," the pure negativity of academic oligarchy the possibility of scientific rehabilitation in an aboriginal context. Cultural "fleshing" will continue with reprints of currently-relevant recently-historical experiences, often gangster, while "the Pale" experience is solidified upto present revolutionary efforts. The hope is to create a hinge with which to restore revolution as evolution after the excessively long period of oligarchic occupation -since 500BC.
Then, probably, the entire blog will be consolidated and "put to rest" with the first wikified writing about the occupy dialectic two years ago.