If the dealer has a hookup available, I would plan on staying in the coach for the weekend. Play with everything you can, and then give them a punch list on Monday and tell them to call when ready to go. I spent a lot of time in the Boat and Yacht world and it was not uncommon to hold 10% of the sale in escrow pending final Sea Trial and fitting out.
The first season will be a shakedown one. I don't care who the builder is, these RV's are a very complicted and system rich vehicle. There will always be some stuff to "sdjust" on a new one. Just my $.02
Vaughan & Tracy 2013 RW 36RL, 2013 F350 DRW CC, 2016 Focus. MorRyde IS, MorRyde pinbox, disc brakes, Comfort Ride Hitch. "Life is to be embraced, Grab it with both arms ! "