I am one of "these" buyers and in a group 2 and 3, move up and Asian.
I had bought my first small, old house in Irvine back in '95 and moved up to Woodbury Sonoma house. ALL of my 55% down payment came from the proceeds of the 1st house.
I did not get any help from any relatives or anyone else in buying either the 1st house or the new house. Also, I ended up in Irvine because the wife went to UCI and liked the city. Didn't have kids back then, so the schools were not really a big part of the equation when buying my 1st house. When buying the 2nd house, we stayed in Irvine so the kids don't have to change schools, scouts, or friends. I don't really save except for 401K and Roth IRA. After that, I spend all of my paycheck. I want to enjoy life while I am able to. I don't want to save all my life, then get sick and leave money to my kids when I die. I will help my kids through college, but that's about it. I want them to be independent and pave their own path like I did. I also got absolutely no help from my kids grandparents on childcare, and I don't plan to provide childcare to my kids either. By the time they have kids, I will be travelling.
I am just trying to show that there are many different types of Asians and not all "these" Asian buyers fall into the stereotype portrayed here. Also, many of my Asian friends don't fall into the strerotype either, although most of my wife's asian friends do.