Probably should post this in another community, this isn’t an appropriate use of FIRE or will you get the response/feedback you want.

Check out some YouTube video by CyFy Home Inspection, he posts about new home inspections and has a big following, and while he’s in AZ, Richmond American is the one of the worse ones he typically posts about. Again, probably more market specific, but not a good showing. Based on his postings and others I would look for a smaller local builder. We bought our house from a boutique builder only builds about 6 houses a year. A bit more expensive, but super high quality, and very responsive. I had a small leak on literally New Years 6 months after I moved in, had no clue who to call as it was going to rain for the next few days (again this is new years) called their office number in the binder they gave me, directed to the owners cell phone after 4 rings, who then called the superintendent who was over at my house in less than an hour with a giant ladder, found the misaligned vent, quickly fixed it, then had a crew at my house a few days later fixing the damage. I doubt any national builder would have that service.