I reread the OP. Bigtoe has been an athlete all his life, he knows about nutrition, bulking up, loosing wt, training etc. I could learn a lot from him.
He did ask about equipment.
Big Toe: The Cottage industry folks really know their stuff about sewing. a longer tent should be within easy range , A slightly modified double sleeping bag might work well. 2- 20" regular air mattress would be wide enough, for your feet, a short mattress or some mattresses can be cut down safely. ( check with manufacturer about weight limits, or custom availability) You know where to get athletic clothing your size, so they could likely make hiking clothing ( fleece top & bottom, wool longies,wool Tshirts etc. Wool Socks Darn tough? You'll need a pack (1 1/2 normal size)? I would think most of the Expedition manufactures make many fewer equipment pieces so that it's almost custom made. All your stuff is much larger so a 100-130 L pack with longer shoulder straps hip belt etc. I'm thinking should be within range. The folks that make -60 down jackets should be able to make you a 0-10* jacket. All these cottage folks know their stuff about sewing. You've been big for a long time, so you know about custom clothing. Money? Oh yeah it's going to be expensive! Particularly on a Subtitiute teachers salary, Maybe you could get a few endorsement deals. I'm sure you know how to do the fight score win thing. So fight score win, White Blaze folks will help.