A family lives in rural Northland, and UFB is not coming to their short road.  But ... it's tantalisingly close running down the main road.

The current internet on their street is ADSL and glacier slow - too slow for internet banking at times, always too slow for streaming.

Two thirds of the property owners on the small road are interested in paying for UFB to be extended down their road.  The other owners are absentee owners or people with limited interest in the internet.

But they are having trouble getting useful info. Is is there a standard approach to this type of situation?  For example: -

They have been told they would have to meet some of the capital costs, and would have to wait sometime for resource to become available.

How much % would they have to pay?

Who owns capital items that property owners (part) pay for, who maintain/replaces them?

If Chorus will get extra revenue from the additional UFB connection, surely there must be some contribution from them?

Can property owners who don't contribute to the UFB extension change their minds later or if the properties are purchased by someone who wants in? 

If yes do they have to contribute to capital costs, and will the original funders be reimbursed?

Any advice appreciated.