Should son switch to ED2 (or even RD) from ED1 before decision day, and can he?

I know it is a private school, but they have a program for Colorado resident to pay instate tuition. There is also a Colorado program, sort of like Bright Futures but not nearly as generous, that pays a per credit amount and can be used at the private schools too. $75/credit doesn’t go far at the private schools but every little bit helps (my daughter used her BF at a private school in Florida, and while it didn’t pay tuition, it helped).

"At Colorado College, where tuition runs $71,000, many new in-state students will pay just a fraction — or nothing at all

The Colorado Springs liberal arts school has launched the “Colorado Pledge,” an effort to attract more Colorado students and eliminate sticker shock that might prevent them from applying"