That's a bummer, that you cannot have a big tank.
I have a tiny woodstove, similar to the small box stoves. It has two 'burners' on top that can be lifted off to put a pot directly over the fire. I wouldn't want to can on it. I have canned on camp stoves, 2 burner type, with a hose connected to a 5 gallon bottle. Takes a lot of bottles if you are doing much canning though.