( I think the authors missed one very important metric in this study: tax rate. 2014 rates per the NH DRAfor the top five ranked cities:
If you compare the property tax on a home in the median home value for Henniker, the number one city of $260,400, it is a whopping $7,989 whereas a home in Moultonboro at the same price would be taxed at $2,307, a difference of $5,682. Divide that by 12 which is how most people with mortgages would pay their property taxes and that is an additional $473 per month. So to Nerdwallet and to paraphrase James Carville " it's the tax rate, stupid."