Just scrolled through your thread Blake. I'm very jealous to say the least.
Best of luck getting everything done. Looks like you are well on your way. I recognized Ken's work immediately. He does great plans and he is about to start his own build soon too.
Don't forget low voltage wire for TV and network wiring. Gotta have internet access it there.
I'm in the northeast, we have to go down 3' minimum to be below the frost line, only having to go 12" is great.
Bob