18-yr-o, 2-story house, loft fam rm., master BR & BA upstairs. No ductwork upstairs. My concern with putting a heat pump in the attic is noise when the unit kicks on and from vibration, and poor heating ability. Vent would be a few feet from unit. Minisplit in BR and loft would be quiet, separately controlled, would heat better, but can't fit a head in bathrm. so no heat or a/c in there. I plan to sell the house in a few yrs. 3 systems seems inelegant, downstairs has heat pump and woodstove. Recommendations? Anything else I should consider? (Mtn house in W No Carolina, it gets below 10 degrees). Thanks.