If you read through the thread, the secrets where even outdated at the time. 

Clean up repeat and outdated listings.

( I understand that building a strip mall is a lot more involved and time consuming than buy existing one) Its good that you're aware of his motivations and incentives, but here you should really consider buying existing first, if the building looks old or outdated, consider investing cash into substantial renovation.

If the house is outdated or ugly, buy w/ the FHA and then fix it up and have it re-appraised to show 20% equity in the home so you can drop the PMI.

If a property is simply outdated, never really touched on the inside, is that alone worth a flip?

The home had been inherited but was outdated and had a reverse mortgage, with a lender putting pressure on them to sell.

You'r standard estate plan is still 100 years behind the times, and families have devastating costs due to poor traditional and outdated estate planning that have nothing to do with asset protection.

The pictures show outdated units, which will cost money to rectify.

Many times that is outdated so I use a paid service beenverified (dot) com to find the most recent address, phone numbers and email addresses.

Myriad sad stories of hardship, life's unfairness and five move out date extensions after closing it was nasty, high drama and unsafe.