It reminds me of a time 5 years ago when building contractors would try to price their jobs based on the effect of the project on your home value rather than how much it costs.
The savings just aren't big enough (considering the cost of installation) to justify this sort of headache unless you just want to be able to tell your friends you use a geothermal heat pump. I mean seriously, it takes at least 7-10 years to get back your money and that assumes zero time value of money. You get on a payment plan and you might not break even for 15+ years.
You really need something closer to 3-5 year payback to really get people on the bandwagon. Maybe the technology isn't there yet, maybe the industry is price skimming because there simply isn't enough demand to aggressively chase business, probably both. I don't think this technology or industry is mature enough to really attract a broader audience.