The water should stay hot enough on its own for a while, long enough to scald & pluck at least one bird. You don't need to keep it perpetually hot outdoors while you work.
I got a nice big stock pot from FreeCycle that I use outdoors, it sets up on a few blocks for convenience. I fill that from other smaller stock pots I boil water inside on the stove. The boiling water is really too hot, I have to add water from the hose to bring it down to 150 degrees.
It's not too inconvenient to carry the pots back & forth from the house, usually my teenage son, who cannot bear to do any of the other business of butchering, is willing to at least tote the pots & keep new water boiling.
I got a nice big stock pot from FreeCycle that I use outdoors, it sets up on a few blocks for convenience. I fill that from other smaller stock pots I boil water inside on the stove. The boiling water is really too hot, I have to add water from the hose to bring it down to 150 degrees.
It's not too inconvenient to carry the pots back & forth from the house, usually my teenage son, who cannot bear to do any of the other business of butchering, is willing to at least tote the pots & keep new water boiling.