Hard to see the plans from my phone but just some general observations and feedback.
1) Sometimes I wish I had a few more plugs. Especially strategically placed ones. Mine are all up high, like 4ft off the ground. A few down lower would be nice so that cords can be run down and hidden behind benches/desks whatever.
2) Bury extra empty conduit going from your house up through the slab so you can get stuff inside later. Ethernet, Communications type stuff for later.
3) If your on the fence about floor coating, epoxy etc. Just do it. I was on the fence and I am so glad I did. I would be kicking myself now if I didn't go ahead and do it while it was empty.
4) Since you are planning for an outdoor kitchen of sorts, plan for proper ventilation. Even though it's outside if you are going to be hanging around there you will want some exhaust. We have (2) 8 or 10" (can't remember what we did) ducts going up through the roof hooked to a hood.
If the Arrowhead in your name is what I think it is, there is a store that has everything you need over there. I bought everything from these guys either off the floor or they ordered it for me and I built my own kitchen with all my equipment from them. You have to do it all out of metal if gas is going to be involved per code.
We are in the planning stages of a pool house/casita and are doing another outdoor kitchen on that which will have a big griddle, pizza oven, fridges, etc. I'll be getting all my stuff from them again.
5) Blocking: add it everywhere. Go in at night and use the framers scraps and whatever you can find to add blocking. I am running into this now. I have air hose reels that I would love to mount on the ceiling but they are heavy as **** and I don't feel comfortable without blocking. I've used up all my minimal blocking I added in for electric reels and things already. So just add tons of blocking where ever you think you might want things mounted. If you don't use it, it will be converted in drywall anyways and only costed you a few beers which is a win win lol.
6) I'll look it up and add the link later. There is a place in Phoenix that has really nice pallet racking. It's all reconditioned, fresh paint, comes with brand new wood. Nice stuff.
7) Maybe I just can't see them. But I don't see any, you need to add ceiling boxes for fans. You will want them. I run all the ceiling fans 24/7 and it does help.
8) The biggest thing I see in your build is the lounge/ office. I would really highly consider better separation. I am pretty OCD and clean/vacuum frequently and everything is still dusty as heck. I would frame and close all that in and do either some big patio sliding doors or a glass garage door or a roll up door.....something you can open to still get that open feel but close it when needed / wanted. You could do 10ft ceilings on those rooms and have a good amount of loft storage that would come in handy.
That's all I can think of for now. If you have questions or just want to bounce an idea go ahead!
