The owners’ goal isn’t articulated
The father wants the house to stay as it is. The mother wants income without worry. The daughter wants influence without full time. As long as that isn’t on the table, every model suits someone and none suits everyone.
Clarify the goals first — per person, honestly, moderated. What should the house be in ten years, what should it bring the owners, what may it cost. The model follows from that, not the other way round.
