Looking good! That is definitely a ton of work.
When you said 8+ acres at the beginning I was thinking lots of mowing... lol I hope you have one of those commercial zero turns. Pretend like you're a race car driver making those stripes.
I see you have one 240v(if I wrote 220 my dad would somehow know and slap me) circuit... While you have the ease of wiring I'd suggest putting at least one more, if not 2, 240v circuits.
The DC is definitely a good choice to use one of those curcuits, but what about bandsaw, tablesaw, etc.? A lot of the bigger stationary tools have 240 versions that give you more power and/or efficiency.
Also, what if you want to do welding? Might be handy to install a 30 amp 240v in the garage area.
I set my garage based workshop up with two 240v(20 amp and a 30 amp) and am thinking about adding one more. I have a Laguna 14BX '220' version and am thinking about getting a Nova Voyager and setting that up with the 240 plug. I also have a Oneida Dust Gorilla '220'.
For the lighting in your wife's art studio space I'd suggest LED lighting with a really high CRI. I picked the CREE LS4(92 CRI) for my shop and they are excellent!
https://www.creelighting.com/products/indoor/surface-ambient/ls-seriesOn the spendier side but they have awesome output - you don't need a ton of fixtures. The high CRI helps with clarity - reduced eye strain, accurate colors, etc.
For the rodent problem I have two words.... barn kitty...
When my wife and I moved into our house in the woods a couple years ago that was the advice our pest guy gave us. He helped us get rid of the mice in the house and secure the perimeter, but he still advised a good barn cat to help out.
Congrats and have fun!
Jared in Washington