gas burner help

[chris1987]

im looking into gas burners as my old one went missing in last move and i need to get a new one to get me up and running
what i want to do is look into one that is alot more economical on the gas my last one threw out 105000 btu's on a high pressure reg rated to boil 1l per min of 20c water i would reach collection time in 35 - 45 mins im looking at a cost effective alternative as the bank account isnt as big as it was when i got that and i dont want that one again that thing chewed on the lpg like a 9kg gas bottle lasted me 2 stripping runs and 1 product run and at $25 per 9kg it adds up to a bit fast
if anyone knows much about building a burner would you mind throwing your 2 bobs worth in i would actually like to build one that i can throw oxygen into to increase the btu's but cut on costs of gas