At sales price of $4 million, the 19 lots each at ~9000 sqft average out to $210k. Looks like the average home will be around 3000 sqft. With them asking for low $900k and up, they should be making pretty decent profit with this set of homes.
interestingly, the property has been for sale since 2005, asking was $4.6 million, but looks like it was only approved for 3 homes per acre, that would translate to ~15 homes. that should have still penciled out quite well during the peak. wonder why no builder purchased it back in the days. per the listing they managed to change the zoning to 19 homes only recently.