In my experience, it is not a win/win transaction if one party is over selling(being highly manipulative)  the deal. some sellers and buyers lie and use crude tactics and gross exaggerations  to gain psychological advantage in a transaction, creating a very adversarial climate that occasionally turns litigious. that being said, most sellers/buyers want to work with other honest, intelligent, and fair/ethical buyers/sellers that can find a mutually agreed upon and beneficial transaction terms, so just being a good communicator(listening especially) and being highly competent and qualified, should be what you use to get it done....IMHO

@Tim SilversJust curious why you are concerned with the seller's tax treatment. 

These are professionals with additional training and a stricter code of ethics.

These are professionals with additional training and a stricter code of ethics.

We do it this way because of the different/preferential tax treatments.

Also, the US treatment of income for non-US citizens differs from US citizens.

If your kid misses rent for any reason are they getting special treatment?

In order to qualify for 1031 treatment the property must have been purchased with the intent of holding for productive use. 

There is no statutory holding period that qualifies a property for 1031 treatment. 

How is that moral and ethical?