Separate Priorities From Optional Work
List what you need completed now and what could be priced separately. You might ask for walls and trim as distinct options, or discuss whether rooms can be scheduled in stages. Ask how each option changes preparation, protection and setup; do not assume a smaller phase will cost proportionately less.
Choosing a lower-cost option should be a clear decision about scope or finish—not an unexplained reduction in the preparation the proposed work needs.