I am making the move from Orlando next week. I just made a post http://forum.freestateproject.org/index.php?topic=28723.0
that has some info you might find helpful. I am taking the Auto Train from Sanford to Lorton, VA and driving the remainder. I will follow up and let you know how that experience goes. I would suggest that you look at moving to one of the cities in the mountains of the state like Conway. I would imagine that your husband could find work at one of the many tourist attractions like Clark's Trading Post with his skills. I would say the only drawback there is that the work would be seasonal unlike here in Florida where they operate year round. The tourist industry in NH is far more domestic and does not have the year round support of the international travelers like central Florida attractions do.
As far as your children's education....I can attest that the NH public schools are light years ahead of anything here in FL. I moved up with my father when I was finishing high school, and found myself far behind the students there. The great thing is the schools provide far more help for that type of situation than they would here in FL. I worked hard and with the extra help of the teachers there I was caught up in a matter of months, and got a far better education int he end.
I have spent plenty of time in FL and NH, if there is anything I can help with or questions I can answer....feel free to ask!
Good luck with your moving plans, hope to see you up there soon.