I was thinking something a bit more current technology than a back using sensor tech from 2008 and a body from 1986.Digital Transitions / Team Phase One already offers brand new Credo 40 kits at $13k with a lens. Other options like a new P45+ for 10k (back only) and a variety of pre-owned digital backs (since the sensor is separate from the body and the back itself does not wear and tear and can be expected to work for well over a decade) at lower than 10k, with warranty, new accessories and dealer support.
Considering the advantages over the 645Z I think that these are a reasonable price delta for many clients. I don't expect Team Phase One to move much lower in price as our sales have only increased since the launch of the 645Z, presumably because the more people look into and consider medium format the more people Phase One has the chance to work with.
I know you continually tell us Phase sales are booming which is great for dealers and the share holders/equity company but I personally see that as a negative as there is no incentive to push boundries or price points. Phase should take a leaf out of Profoto's book and worry less about being a luxury brand and produce a system more people can use. I no longer use a compact camera because I have my iPhone. If Phase or Blad priced their cameras like top tier (or just above) 35mm cameras every serious photigrapher would jump all over them and leave 35mm in the dust even with MF's more expensive lenses. In the 35mm market HQ lens sales (Zeiss, Sigma Art etc) is a growing market so people see the value in good glass and don't mind spending meaning potentially excellent profit margins.