Everything from sales staff to the site sups to the warranty. Very happy homeowner.
I would add a live Youtube video of daily yearly operations in multiple languages so the new owners would have easy access to be on top of any issues. I'd also supply on the electrical panel all the important numbers for emergencies. Electrician, plumbers, and HVAC guys. Plus I would provide a few necessities for move in.
Layout, Location, LVP flooring, size.
Changes -> stove & dishwasher are basic. For the cost of the home $500,000... should include higher end . c out cost upgrade. & larger shower in master.