She might be able to find a job that would utilize her MBA up there in Burlington. You could also consider something closer to the south and finding a job in Albany, NY or MA. I hate to suggest having to drive to each place, but the job selection is much greater over there than it most likely would be here. Just off the top of my head for "big" places down here, I can think of Mace, Energizer, hospitals..etc. Resort work and health care are the top 2 job industries in this state. It shouldn't be hard to find a real estate gig, they're all over the place.
As for taxes - I found when I moved from NY I had higher deductions, mainly in SDI (500% of what I was paying before). State\income taxes seemed to be about the same. Property taxes aren't too bad comparatively, neither are sales taxes. As noted before NH doesn't have income or sales tax except on prepared food, but I did notice in my search the cost of living was higher than where I am now for much of the state. Of course, you may experience something different.
As for firearm laws, either way you go you can't beat it but I love VT's laws. I can't vouch for NH, but VT has state preemption, and the AG has shown to usually be on our side when it comes to this. A few years ago Rutland tried imposing OC restrictions, ended up arrested a couple people, and was told by the state what they were doing was illegal. The only place we can't carry is in state institutions or schools (and obviously the federal-restricted places as well). I haven't been hassled (yet, at least) by anyone while OC'ing here in town, and I'm almost 100% sure I am the only person who OCs around here; I've actually never seen anyone else OC'ing in the entire state. I would be careful OC'ing if you do move to Burlington though, it's home of the hippies\liberals and you will get the police called on you..a lot.
The only two laws are related to Fish and Game, and those are no suppressors and no loaded rifles\shotguns in the car. An empty rifle on your passenger seat with a loaded magazine right next to it has been fine in my case, but again, your mileage may vary. We have no CCW\OC\handgun permits either, but NH's permit is $10 for 4 years and is required to be completed and sent back to you within 14 days, so that's not a big issue either.