The tension you're naming is real, and the assumption doing the most work in your framing is that speed and local expertise are in opposition. For a wholesale assignment in NoVA, they usually are not, because a buyer's agent who runs investor deals regularly already has the comp pulls staged, knows which zip codes carry the ARV and which just look like they do from the outside, and can move in hours rather than days if they work that market actively. The slowdown risk comes from using the wrong agent, one who treats the assignment like a retail transaction and calls their title rep who has never touched a double close.
NoVA is a market where the spread between a defensible ARV and an optimistic one is wide enough to matter at $380k. The DOM on comparables, the micro-neighborhood variance between, say, Burke and Springfield, and the contractor availability assumptions that underpin any value-add thesis are things a local agent working investor volume knows by feel. Someone walking in cold on a wholesale assignment without that is essentially pricing off Zillow and hoping.
The unmentioned risk here is on your gap funding side. If you are evaluating borrowers who are acquiring wholesale in a market neither of you knows well, the ARV your borrower brings you is only as good as the comp analysis behind it. A borrower who skipped local representation to move faster may have bought a spread that does not exist. That is your exposure, not theirs alone, once you are in the capital stack.
The post-NAR-settlement dynamic actually helps here. Investor-focused buyer's agents in active markets have strong incentive to structure their fee as a business cost conversation rather than a friction point, and sophisticated buyers in NoVA's investor community are transacting with that expectation.
What does your current underwriting process look like when a borrower presents ARV on a wholesale assignment in a market where you do not have your own comp source?