To answer the questions about framing, you’ll find very few subdivisions here that weren’t built with 2×4 framing. All of Bressi Ranch is 2×4; everything I’ve seen in San Elijo and 4s Ranch is 2×4. It’s everywhere. It’s not just the framing either. The roof trusses are 2×4, the fopundations are pured at the minimal depth; the plumbing and electrical schedules are average at best.
That’s not bad in and of itself; there’s nothing wrong with “Average”. It just cracks me up to see the words “luxury”, “custom”, or “quality” used in connection with these projects. People from back east look at this stuff and just smirk.