2 UDS will pay for themselves in about 3 cooks compared to the amount of fuel you will go through keeping a double barrel cooker hot. They are serious fuel hogs.
Modded Brinkmann Gourmet. Basic UDS. Rescued 22.5" OTS. SJS Mini-WSM. Stubbs. B&B Oak Lump.
Cannondale 2009 F8 (for burning off all the great BBQ)