Because it is now an investment property it qualifies for sec 1031 treatment. 

Is it common for tenants to stay in the unit if the extermination process is three weeks - three separate treatments?

He is a up & coming agent with a multifaceted work ethic and dedication to the client.

Basically double, which was the goal.5% of the units will get this treatment.

Ethical dilemma if you have been communicating with a buyers agent.To sum things up, if you are a newer investor and want to limit risk use a agent you have formed a relationship with.

@Mike Rosback I hear that excuse as well of not wanting to be bound by the ethical rules of being a Realtor.  

I am considering doing a DIY treatment right at the beginning of the project so if i missed something, it would take care of it when i put it up for sale.

Was this an investment or an opportunity to help your father.And John is right, there are other ways to establish it as investment tax treatment wise. 

I am still waiting for you to show me where the facts may be found, that only a registered and licensed broker can buy/sell/assign a property in an ethical manner. and provide "value".

This raises some ethical questions and in reality doesn't really resolve the "management and maintenance" component because since it's likely the "seller" is going to retain the property, do they really want to turn over responsibility to the tenant to take care of the asset?