I'm in vegas & had ours built last year. 2 of my neighbors recently had theirs just built as well. Going own route is smart IMO. I should've done that as I ended up doing all day-to-day supervision & quality control myself. Sore subject.
Smart move on wet deck depth. I have 18" wet deck & everyone loves it being a bit deeper & as a bonus my robot goes everywhere on the wet deck due to that depth. You should only need 1 step between the decking surface to what will be your 18" deep wet deck.
I would nix the in-floor cleaning system in favor of a robot. That $$ could be better spent elsewhere in your yard or on other stuff for your pool. Never personally known anyone that would do it again after having theirs for a while (or longer term). I realize some people in the world like them but to me they're not worth the up front cost nor worth the expense down the road when parts start failing. To each his/her own though.
Do you only want 5' depth in your deep end? If so, zero problem with that but often I've seen it where pb's talk people into this as it's easier on them.
Key question on skimmer: Which way is everything orientated on your lot N/S/E/W? Due to our prevailing South-to-North winds skimmer placement is crucial IMO.
What's on the other side of the wall in your house from your proposed pool equipment location?
I would suggest you consider extending your deep end platform, shelf, seat or whatever you want to call it all the way to your wet deck making 1 continuous shelf connecting the two. That worked/works super good in ours but ours is a fair bit wider than yours will be. Anyway, just a thought.
Have a couple of electrical J-boxes plumbed in during your project on the ends or the back side of your pool. Super nice having some electrical outlets on the outskirts or each end of the pool.
I have a list of subcontractors that was used for my build. Some of them were awful, some good.
Strongly suggest you DO NOT go with a tablet-based Rainbow chlorinator setup as a means of sanitizing your pool. If you're going to go with the management style of maintaining a pool as it's done here at TFP you will have ended up wasting your money on the Rainbow chlorinator and moreoever, tablets or 'pucks' are the Debbil here in TPF land. Either use liquid chlorine or spend a couple of bucks during your build & start from day-1 with a salt water generator as the heart of your sanitization system. I wish I had & I will be converting over if hopefully the prices of SWG's go down in the fall. I wasted money on the Rainbow chlorinator as I used it for a minute until I found TFP & have no use for it now.
STRONGLY suggest that whomever you contract with you make it a contract stipulation that no concrete/gunnite work of any kind nor any inside finish work such as plaster, pebble tec etc be done outside of being the 1st job of the day nor be started later than say 10:00 am. SUPER important to me if your pool work will be done between May-Oct here in the Vegas valley. It's not in your best interest to have a crew showing up at noon, in 100-degree heat, & with our typical building of winds hour by hour, after they've just finished up slaving on another back-breaking job earlier that day. It's a recipe for shoddy workmanship & is easily avoided if you make it a point of the contract.
Have some kind of provision in your dig contract for if/when they run into caliche. My contract had x-amount included in the dig price. Hammer Time can cost a fortune if you get unlucky enough to have it in your dig area (& the stuff pops up here/there all over the valley).