Now the buyer's agent will get a Buyer Agency Agreement that details out the minimum compensation they will accept. 

The collection agency reports them to the credit reporting agencies, dinging the tenant's credit and showing the collection to anyone that runs a credit check on them.

This is not legal advice please consult with you attorney).Consider a step-by-step process increasing the pressure on the tenant with each step while accumulating documentation (which will be needed in Eviction Court):As per the prior comment, first contact the State Agency sponsoring/funding the Section 8 payments and document for them all the issues to see if a resolution can be reached.

It has helped me to network around and have multiple investors and even real estate agencies I can call to work out a deal with first. 

We haven't tried to work with any agencies yet, haven't needed to.

His average contract value is around 15-20k and his profit margins on these jobs are roughly 50%.I don't have an agency or any sort of business that provides this service.

There are travel nurse agencies like Aya Healthcare who provide housing for their nurses, but many nurses in my experience are looking for their own housing on the listing sites and Facebook.On the property side of things, like Eliott said, you need a space that is attractive to nurses.

I know apartments.com used to offer that feature of reporting to credit agencies for free but it's no longer available as a feature. 

Are there other insurance agencies that cover mold and groundwater damage? 

My properties are in 4 states and we do fine, but I am learning that MTRs can really pay off if you put time into building relationships with placement agencies so it's a pain to have to do that in many markets.