Setting up an Official Residence "Out of State"

[Account Closed]

We are coming to the college years with our kids and we are finding (no surprise) that college is expensive and very expensive if you are an out-of-state student.  As a full-time developer, investor and consultant, I could theoretically work from anywhere (although most of my income would still come from my Idaho).  Has anyone done this?  I'm thinking of buying a place in another state and officially making it my "home" (for tax purposes, for homeowner write-off, etc.) but the majority of my income will be from Idaho and my son will finish high school here.  Most universities look at the parent's residence status for the kids application - if I do this a year or more ahead of time, would I be able to have him enter a university in my new state as an in-state resident?  Any challenges or things to avoid?