Another vote for 4 dog stoves. I've used a 3 dog model in an 8x10 tent for years down to sustained -40s and been warm. They have an internal stove damper that makes the heat and flame travel in an S shape before exiting the pipe. This gives you more heat and a hot spot on the top of the stove for fast cooking or water boiling. This spot will warp easy if the stove gets red hot. The stoves are truly air tight.
A pipe damper isn't just to control burn. It also reflects the heat back into the fire box to increase efficiency of your burn. I'd highly recommend one. They also help stop sparks.
For water, I think the tanks are a pain. Just get a big pot on top. The warming shelf is nice on the dog stoves. Gives lots more space and various heat zones for cooking and melting snow or heating water. The tall legs on dog stoves also offer a place for wood storage. We recoat ours each year with stove paint and it still looks great after six years of use, besides a small warp here and there.