That's optimistic. The 3 GSHP systems and one ASHP I've been involved with have been in the $50K+ range although all but one were a new build and includes the

That's optimistic. The 3 GSHP systems and one ASHP I've been involved with have been in the $50K+ range although all but one were a new build and includes the AC ductwork in the house (the other was forced hot water and involved retrofitting ducts). Tack on another $15K+ or more for the drilled well & pump (obv. not needed with ASHP). Sadly, it's kind of a boutique market and people who want these systems are often willing to pay quite a bit for them. As for the rebates, most of the installers seem to think that belongs to them, so if they're quoting $50K, that's after the rebate, despite the fact that the equipment (e.g. a 3.5 ton water furnace) isn't really that much more expensive than a higher end high-efficiency gas boiler (e.g. $5-7K ish).