which would you prefer to do a build with? is there any benefits to either? i know the pipe could be as thick as 3/8 inch but is that necessary? and i know the propane tank is usually at least 1/4 inch thick. Also are we talking at a couple thousands of dollars to build one on a trailer? any advice would be appreciated. I am also thinking of maybe doing a reverse flow. however i like the fact that i can put some chickens down near the firebox on a regular offset.