There's nothing wrong with a versatile reverse flow smoker.
Recommend getting some fire-tending time on someone else's 500 gallon reverse flow before you start cutting metal..
Contact a member '5-0 BBQ' who built one of those monsters for a better insight.
Cooking at Mason-Dixon BBQ Services
Lang 84 Deluxe Kitchen known as "The Glamazon" , Custom Klose Backyard Chef... of Snot, and a 22.5 WSM
Lang 60 Mobile - The Damsel II, Lang 48 Patio - The Damsel, Bubba Keg Grill - RIP, Double Barrel Smoker and a BSKD