Portable rockets stoves are great, as they burn with any kind of stickes. No fancy firewood needed. You might want a pressure cooker, which would further need less heat as things boil in lower temperatures.
 But the pot is going to get dirty, so I have dedicated a couple of pots for rocketstove use. I don't clean them, and my kettles in the house stsy clean on the woodstove.
 Mine is purchased, because I am totally helpless in metal working. But if you are not, you can save by building it yourself.
 
https://wildchefkitchen.com/product/petromax-rocket-stove/