I would like to thank everyone here for your kind advises and spend precious time writing detailed advises.
You have all been verrry helpful!
I would like to give detail information on how we reach our decision based on our limited experiences and our two college visits and the many advises received. Hopefully this will help other readers in similar situation now or in the future. Also, understand that this is just from our point of view.
To update, my son, my daughter and I visited UCLA by registering with campus tour. We could not attend Bruins Day at UCLA because it was on the same weekend that my son need to leave for Princeton Preview. We all loved UCLA! The foods- better than some restaurants. The students, and yes we talked to a lot of students, were happy, helpful and great. The campus, beautiful. We all could not stop talking about how much we loved UCLA all the way home (three hours drive). Such a happy day. My son said that he would be happy to go there. Then, again this was our first official college visit. I know a lot of high school kids went to visit colleges waaayyy earlier, it was my fault and my son said he was happy to visit after being accepted.
Then we attended Princeton Preview. My son was on a plane with six Californian students. They were all picked up by a Princeton alumni from the airport, and they were together from 6 a.m. til 8 pm. I flew there on separate plane. Students had different schedule than parents.I went on the parents tour and love the place and the people, and made more than a few friends my self, at least three of the moms were like my best friends (totally not expecting that) who shared hugs, who shared stories of our kids and concerns. Lots of parent were so happy and just could not stop smiling from ear to ear. I learned that the building would be heated up to 70F during winter, including the residential dome, that was a major concern I had.
I went to the Physics building where professors talked about so many alumni(about 1000 out of a class of 1300) came back from all over after graduation for reunion because of how much they loved the school and the people. I went to the Health Profession Advise sessions where advisers and current students answer all my questions.
So when I saw my son again he was lit up and could not stop talking about how much he loved the people there, especially his group of friends all hugged when say goodbye, exchanged phone numbers etc... He was so happy because of the people, just so modest, opened, understanding, happy, enthusiastic and ambitious.
One of SDN member here from Princeton put it like this "More ambitious student population (I have been changed so much for the better just by being around super incredible people. I can confidently say that the caliber of the average Princeton student is higher than at UCLA)."And after both college visits I totally agree with him.
I talked to many Princeton students and I loved the way they responded, more details and really made sure I got my answer.
A few days later, we received a mail, Princeton increase financial aid for my son!
So yes, my son will don orange and black and become a tiger!
Thank you all again for reaching out when we really need it.
Best,
Still-Learning