I'm in northern VT as well and I have one phone with ATT and one phone on Mint. Both have dead zones in my area, but Mint had vastly more.

Bad. Not nearly enough towers here. That goes for everything on TMobile, including Mint. Look for a carrier that uses Verizon or ATT.

Teacher salaries are public record, and there is a variation in salaries across the state. I recommend looking up the Town/City Report in the area that you're looking to move to, and you can review the salary ranges. Finding somewhere to live is probably going to be a challenge, as housing vacancies are very low, so also look at rental rates to compare.

Unfortunately most of the meetup groups I've seen around here are either very niche specific or inactive.