Ask whether the scope covers reconciling operating names, legal employers and the proposed qualifying relationship. Clarifying these facts early can define what preparation is actually needed.
Price the actual work required
Separate professional immigration preparation from any corporate documentation work and current official charges. A polished internal chart cannot replace missing legal relationship evidence, regardless of what it costs to prepare. Price the entity question first, because its answer determines the size of everything else.
If the qualifying relationship is documented and current, the corporate portion of the file is largely assembly. If it is not, the work becomes obtaining registry records, reconstructing share transfers and possibly waiting on a third party, and none of that compresses by paying more. Hypothetical example: a clinical-supplies wholesaler commissions a complete petition package, then learns that the affiliate relationship rests on a transfer never recorded anywhere, and the drafting already paid for has to be set aside until that is resolved.
Ask for the review to be scoped in two stages with a decision point between them. The first stage answers whether a qualifying relationship and a qualifying year exist; the second builds the file. Money spent on the second stage before the first has reported is the money most often wasted.