How do co-owners keep the costs straight?

Splitting is the half that gets all the attention and it is settled in an afternoon: the fixed costs usually follow the ownership share, and the per-stay costs usually follow whoever was there. What comes back every quarter is the second half of that sentence, because somebody has to know who was there and for how long.

In Mooring that is not a spreadsheet anybody maintains. Every stay is a dated record with the household on it and the number of guests, so the question answers itself, and on Homeport the whole history exports to a file for whoever is doing the sums.

How does time in the house get shared?

Almost every group settles the handful of weeks everyone wants and leaves the rest open, and almost every group finds that the agreement describing it is not the thing doing the work. An allocation everybody signed reverts to whoever writes their week down first, unless there is one calendar behind it that everybody can see.

That is the first of the two questions a document cannot answer. Mooring gives it one place to live: shared availability, requests that are approved or declined by a person, and a dated note attached to whichever way it went.

Who answers when the usual person is away?

Most agreements name who decides what, and almost none of them survive the fortnight when that person is on a plane. The arrangement does not break, it just stops, and the household waiting on an answer books somewhere else.

Co-owners in Mooring manage the home together on Marina and Homeport, with the same calendar and the same authority to answer a request, so no stay waits on a single phone. Everybody else can see what is free without needing anyone at all.