I'm not sure you really need to be worrying about employment all that much. From what I've seen NH has a very healthy economy and is likely to be one of the best places in the country to find a job by the time the move is made. Also, with 20,000 new people, comes new business. I am sure that many people are planning to do exactly what I am when the time comes and liquidate their current businesses and investments, then reinvest in the NH economy. I foresee a staggering growth for NH's economy after the move has been made. Especially when you consider that the there is likely to be a very high percentage of FSP members who are actively involved in the economy. With the ideals and constitution required to do what FSP members have agreed to do, usually comes a hightened appreciation and involvement in the economy, meaning either business owners or investors. I would be willing to bet that NH's economy gets a huge shot in the arm as a result of 20,000 dedicated individualists moving there within a 5 year timeframe.
P.S. Speaking of business in NH after the move, is there currently any kind of oraganization or alliance of businesses within the FSP? This might be something to consider once the move has been made. A good profitable commercial backbone can do wonders for political activism.