Um...I dunno iffin ya'll use different terms over yonder, but a cookstove is a cookstove..not just a woodstove..is that how ya mean it? Iffin that's the case...a cookstove is expensive to buy and a cookstove aint really needed fer cannin. Great if yer bakin bread and all that...although some of em have broilers in em...where folks used to heat up water in. It's a seperate box, usually on the side of the stove. Them stoves run about 4g's today..there are some here you can look at:
Cook Stoves
I buy alot from them folks...esp the gallons of parrafin.
If yer just water-bath cannin...you could buy a huge dutch oven and can over a wood fire in a pit. That's how we used to make apple butter and stews and my folks used to water bath can. Shoot, we were more concerned with sittin round the fire all day BS'n and sippin juleps than how long it took the stuff to can or cook.
Course...we're the type to make a hog killin or steer killin an all day event. You worked yer butt off...but Lord was it fun. It's alot easier when ya got help...freinds & family got "paid" by sharin the meat, eatin fresh sausage all day...and a huge supper followed by some pickin & grinnin and more juleps...lol
Anyway, a regular woodstove or the dutch oven is ok...just keep a hot fire (poplar or pine cooks hot and even on cast iron) and you can buy a cheap woodstove fer about 200$ round here. Just make sure they're all cast iron, so it'll distrubute the heat real even. That's all you need.
Good luck! I think I need a julep now...lol