As a seller, how much do I value a certain payout today? It's at least a few % points.
As a buyer, how much do I value a property which has been "Approved" and been fixed up? Again at least a few % points.
They can easily get a 5% margin, if not closer to 10% (especially if they do value-add improvements)
Then it is just about managing inventory, and not being overly exposed during a downturn - however depending on how their capital is structured are there is the opportunity to rent until it can be sold.