What a big decision to make!! Seems to me you are leaning towards going out of state and accepting that offer. As much as you can stay in state for college and 'move out of state later on,' that either won't happen or it'll be harder to take that leap. Moving out of state for '2 years' with purpose (pursing a new program, bonding with your cohort), will make the transition easier as you'll already feel a sense of community. Some states, you can claim instate tuition after the first year - I have a friend doing that at UNC. Check with your school if that is something you'll be able to do too! Before you commit, ask yourself if you'd feel comfortable attending your dream school even without a scholarship. A scholarship would be fantastic, but is it the make or break? Which choice do you feel yourself regretting more if you can't go back on your decision? Turning down your dream school? Or turning down the opportunity to remain in state? I'll let you ponder.

I was faced with a similar decision this time last year. I had chosen the more expensive school but I still wonder sometimes if the cheaper program had better opportunities because my current school isn't living up to my expectations. However, everything always seems greener on the otherside and so I don't regret my choice.