For us, Santaluz is the same analysis as any other new development. No costs to upgrade the home as it is already brand new. In Fairbanks Ranch and some other areas, we are buying homes that require complete interior updating. Maybe not knocking down walls, but kitchen/bathroom remodels, new floors, finishes etc.
So while you have to pay Mello Roos, you don’t have to pay for improvements. Tough call.