Thanks for the replies and feedback!
Lots and lots of copper! I get it!
I'll have the extra dedicated circuit added in to our contract with our electrician, and I'll add grounding rods as I go.
I like the 2" conduit (non-metallic I presume) to the attic and I'll also route a spare out to the yard.
I'm also planning to put in a future PV array and plan to net-meter with Xcel Energy once we have the bucks for the initial installation.
Any and all ideas are appreciated. I've got the ceilings and walls open now, so I hope to get this all planned out soon.