FYI, based on my past experience, for avg urban customer the total acquisition cost for a cable ISP on DOCSIS 2/3.0 was about $750 -- small delta vs your new build cost.
Virgin Media is the only UK-based ISP that uses cable (DOCSIS). All others use VDSL2 where available, ADSL2 or just plain old ADSL (g.DMT) if you're sufficiently rural.
The trouble is that Virgin Media have much cut out for them if they want to match the availability of VDSL in the UK. Therefore, I can imagine they will be targeting large towns on the commuter belt long before they consider more rural villages.
The trouble is that Virgin Media have much cut out for them if they want to match the availability of VDSL in the UK. Therefore, I can imagine they will be targeting large towns on the commuter belt long before they consider more rural villages.