An offer is a bet on a scope of work. If the scope is wrong, the offer is wrong, and no amount of negotiation later fixes it. That is the part most investors are guessing at when they buy.
What I bring to a purchase decision is the same discipline the job needs anyway: a scope written line by line, costs tracked against it, permits and inspections treated as schedule items rather than surprises, and change orders documented when conditions change instead of absorbed quietly.
None of that is exotic. It is ordinary construction administration. It is just rarely applied before the purchase, which is exactly when it is worth the most.