what i see is comparable to a combination concrete pumper and gantry crane

https://static01.nyt.com/images/2021/09/28/business/28printe...

https://en.wikipedia.org/wiki/Concrete_pump

https://en.wikipedia.org/wiki/Gantry_crane

Does anyone have a sense of how expensive each building is?

there was a mention of overall costs

""In March, Palari Homes and the construction company Mighty Buildings announced a $15 million planned community of more than a dozen 3-D printed homes in Rancho Mirage, Calif. The community has a waiting list of more than 1,000.

The same month, Icon announced it had teamed up with the developer 3Strands and DEN Property Group on

>>four 3-D printed homes in Austin, priced at $450,000 to $795,000.<<

Icon has also printed homes in the Community First Village in Austin, a project of the nonprofit organization Mobile Loaves & Fishes that provides permanent housing to homeless men and women""

My guess would be not cheaper then a conventional wood-framed house of the same size even if the 3D printer can probably be built for only a few thousands