Not sure if big enough for your needs but Big John's carries a basic, sturdy 5 footer for about $500-600 (I think), bought mine used. Think they're a touch cheaper than Meadow Creek (not talking about their chicken cooker). It has a single piece solid steel trough with a large adjustable steel grate. Legs unscrew for packing, and heavy duty wheels optional.
Meadow Creek TS-250, BQ Grills Pig Cooker, Weber WSM 22.5"