Though keep in mind that no two lots are identical and you'll have to adjust for the tangible differences and the intangibles.The other way to do it is to determine the lot's "highest and best use," and then work backwards from the ultimate value of the property given its highest and best use, subtracting out the hard costs, the soft costs, the builder's desired profit, etc. 

The key is hoping it really dips and we don't just have a soft landing where the market flattens or just has a slower rate of appreciation.

I had noticed that on occasion the soft and friendly approach wouldnt quite get the convo going.  

@Tanya Bass

Of course you can attempt to go the inexpensive route and purchase existing plans or have the builder draw them up (if he provides that service) but your construction costs alone (not including soft costs) will be at at least $300/ft.

Actually, one of the offers was soft accepted, but we found out after the seller kept us in limbo for a month that he wouldn’t take the offer with our contingencies that he fix his violations, which were significant.

I am able to get Soft Proof of funds and Hard proof if needed by seller.

I seriously doubt you could ever patch it successfully where you couldn't see the repair, unless you completely restuccoed.I would first try a paint color that has less contrast than the dark brown, like a soft grey.

The first building that was built has granite counters in the kitchens and baths, some hardwood floors and some 18X18 travertine, upgraded carpets, upgraded cabinets with soft-close, etc. the second building had some granite and some high-end Formica.

Soft compared to 2014.