If you're interested in installing heat pumps, there is a similar open data initiative started by some redditors to aggregate heat pump pricing quotes.
Really shocked at those prices, I really don't understand what's going on in the US/Canada. I could get a 7kW Mitsubishi Electric single-head mini-split installed with change for AU$3000 here (US$1950) if I buy the unit online and get one of the many, many installers around to put it in (fairly simple install if it's near an external wall is around AU$750 at the moment), but that document has prices in the $7K to $12K for that size?!?
Which is why mini splits are not very popular here. The install ends up costing so much. Labor is not cheap in US/Canada, and install is a lot of labor. Still seems like it should be cheaper though.
They're only 3.5kW units, but they seem to be the sweet spot of mini-split systems locally.
I recently paid 325 euros (about $350) for a unit and 200 euros (about $215) for installation. They are cheap Chinese units but the quality is good in terms of performance. This year they might be even cheaper.
I paid 15k CAD for 2 Daikin units two years ago, the pricing is kinda stupid but it depends on the quality of the model. Chinese models are way cheaper than Japanese models.
https://docs.google.com/spreadsheets/d/1hBebytdBOzLQ4eoAbdFQ...