First and foremost congratulations on your purchase.
Found out later when we went camping they did not caulk the shower doors, heard a few others say that also, did it myself, but not before having water running on floor.
Dealer installed batteries, but not best quality, I have since replaced with good ones no problem after that.
You'll have a punch list, but nothing that cant be fixed, and I found easier to do small repairs myself rather than have to go sit at dealer, just don't do anything to void warranty.
Oh yea, most important, have you husband install another cut off switch that will kill all power from batteries if you allow RW to sit for awhile, as switch installed by factory still supplies power to RV for certain monitors and will drain your batteries eventually, its a simple add on and well worth not having dead batteries.
Happy trails to you and your family.