The big issue in New England is that heat pumps (ASHP or GSHP) are only really possible for new builds. Most existing homes will likely be forced hot water and there isn't any heat pump out there that will produce water hot enough (e.g. 185F), so your only option is to retrofit ducting (or go mini-split but then you need one in every room).
Even homes with ducted AC, it's likely they are sized for cooling only, not heat (not enough CFMs).
Even homes with ducted AC, it's likely they are sized for cooling only, not heat (not enough CFMs).