First , what are you planning on cooking?
If heating a 80-120 qt crawfish pot or turkey frying you need a high pressure unit, but it's not good for much else.
If you want to cook in smaller pots, put a griddle on it or fry fish in a 12 qt pot a low pressure (up to
30,000 BTU is more flexible.
I love the camp chef cast aluminum burners!
An explorer cook top with 2 burners can be found for about $100.