ok, not really an AIBU, but here for traffic. And maybe I am BU for not knowing the 'fairest' way to do this.
What would you consider a fair way to split the cost of this holiday accomodation. 3 bedroom villa (2 doubles, 1 twin). Guests are a family of four (2 adults, 2 primary-aged children, who will be occupying a double and the twin) and a single adult (occupying the other double).
Would the single adult paying a third of the rental cost be fair (i.e. based on bedrooms)? Or would it be fairer to divide by 4 or 5 even?