If you can find a well-cared (used) Bubba Keg Grill - same size for a fraction of the cost for a large Big Green Egg.
OTOH - there is nothing wrong with Harbormaster's advice working WSM's thru the Winter.
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