7’6" tall will fit gorilla tents just not with extensions. I would continue your environ controls plans but treat the rooms as lung rooms.
plan out some 4x4 and 8x8 and all kinda options, but I think it will make cleanup way easier and controlled. Ultimately you wanna keep perpetual cycled grows going and having many seperate areas of more specific environ controls will help you in grow quality as well.
whats your harvest/dry/cure plan? being able to “flip” a tent into a mini dry room can be a help. I’m just a home hobbyist with a couple different sized tents, but am very intrigued into this setup! good luck with it!