You may need a larger than 1/2" feed pipe from the source to be able to run all 3 burners. I believe 1/2" may only be adequate to run 1 burner at a time, but I will let others with more experience chime in.
I am also exploring using NG instead of propane, and from the discussions I've had, it seems like your lines may be undersized for a full 3 burner setup, if you plan on running more than 1 at a time.
Kegged: Wheat Pale Ale
Kegged: Pale Ale
Kegged: Vienna Lager
Ready to Keg: Jamil's Blonde Ale
Primary: BierMuncher's OctoberFAST Ale
On Deck: Really want to do a nice Irish Red Ale, a new wheat ale, a pilsner, and another pale ale with some different hops than I've used before.
Meads: BOMM, JAOM and Tart-Cherry Melomel aging.