If your parents have a second home, the equity in that home IS included on both the FAFSA and the Profile. You might get less need based aid than you think you are going to get.
Unfortunately unless a net price calculator specifically asks for second home information, you are not going to likely get an accurate result.
It’s also very possible that this second home equity could affect your eligibility for Questbridge. @Gumbymom can perhaps tell what this does in terms of the CalGrants.