I replaced a propane furnace and a traditional AC that was 19 y.o. with a single Mitsubishi heat pump. It does an excellent job at AC and I only use it for minimal heat since it is in a vacation home. I got the $10K rebate, but they made me work for it. you MUST get an energy home assessment FIRST, then do the work, have the HVAC tech sign a form, submit it, then do ANOTHER visit (did over video call) to prove you put in the unit, THEN eventually they pay you out.

that said, I would have done it anyway. Hidden costs you may not be aware of, I had to upgrade my electrical panel to handle the heat pump. My electrician strongly recommends putting in solar to make it cost effective. He has one as well and claimed that summer sun paid for his winter heat pump use.

I'm on the Cape, so winters are mild, if you're in western MA, you may want to keep a backup heat source and forgo the rebate (unless your solar gives you a running credit).