Footage, picture of home, total value and net value, type of property, taxes that they paid for this year, and describe if they are doing business with rentals.

If the space is conditioned you can list it on the square footage

Depending on the square footage, it sounds order of magnitude about right in price.We typically find our turns are in that $700-1,500 range as well. 

What is a good value to use when caculating after repair value by square footage on the Westside in LA?

Square-footage +/- 10% of the subject property.

Creating value by adding livable footage efficiently. 

Its easy to measure the square footage and get an installed quote from any number of suppliers, home depot offers this in most markets.I don't know what your partner meant about outdated walls....and that's completely subject to my budget and intended use, but rarely would I find the average house in need of full on wall replacement (though it does happen).

@Tarl Yarber how much did it cost to finish out that square footage in the basement?

Based on the pictures of the other homes in the area the only thing justifying your price is the larger square footage, but the finishes look comparable to other homes that are noticeably cheaper that also have more bathrooms.

And sometimes, it takes a little bit of video footage, and some market explaining, but more often than not, people just sign up for an MLS feed, and that's where they stay in these conditions.