One property, one thread
Keep every room of a project together so the finishes are decided as a set rather than one weekend at a time.
Renovations
Argue about the finish before the builder arrives.
Most renovation disputes are about a picture nobody agreed on. Produce that picture first, from the actual property, and hand it to everyone involved.
Show the trade what you mean
A photograph of your own room is harder to misread than a mood board of somebody else’s house.
Cost the change, not the dream
Because the structure is held, what you are pricing is the finish. That is the number that tends to be reliable.