J.M.
The hardest thing we, as humans, deal with is change. However, if you never take the chance you'll never know if what opportunities could be out there. If you get the job and get out there and after a while decide you just don't like the distance or whatever you can always move back.
You family will (should) support you just because it's you decision and you need to do what's right for you.
As for the things you listed. If you work through a realtor, they can steer you toward the correct contacts. A good realtor has to be knowledgable in communities as far as schools for kids, etc.