Delays in a linked sale rarely come from one slow party. They come from four or five structural dependencies, and the waiting has a monthly price you can calculate.
Consulting pitches are built to be convincing. Five checks, and the documents behind them, that separate a firm that can do the work from one that can describe it.
A pitch is a rehearsed artifact and tells you almost nothing. Here is the small stack of documents that makes an outside expert's actual work visible within a few weeks.
Location drawing, boundary survey, ALTA title survey, home inspection: four different products with four different prices, and the reasons a quote moves.