Got this kit off Amazon in case anyone else was wondering.I ordered a 12 pack of the 24oz cans and an extended reach spray gun for $217.00. Supposedly it will do 240 board feet. Even if it only does half that I should be in good shape. I'll post up my thoughts about it. I just have the room in the lean to to put insulation panels in yet, then spray foam cracks etc. If it's half as easy/ nice to use as you guys say then I'll be in good shape. Seems about the same cost per oz out of the little cans, but they are such a mess and hard to use in the ceiling. Fingers crossed it works out well for me.
GREAT STUFF PRO Gaps and Cracks - 24oz Fireblock Foam Insulation Sealant, Case of 12. Closed Cell, Polyurethane Expanding Spray Foam. Seals & Insulates Gaps Up to 3". Applicator Gun Included https://a.co/d/aKU36vW