I can see holding onto the Release of RIghts of Possession and perhaps the SD accounting form, but is there value and/or need in holding onto other documents associated with prior tenants? 

I have heard about Re-leasing fee's.

With the passage of Dodd-Frank, and the extension of fair debt collection statutes (both state and federal) to, not-only third-party debt collectors, but to owners of that debt as well, the regulatory bodies have exhibited their intention to continue protecting the consumer.

If this is just a one time lease up for a broker/agent that brought the tenant that does zero PM work and just leasing good luck trying to get money back on that one or get something for free on a release.

A recent state budget outlook released projected a more than $2 billion budget gap, in large part due to a new voter-approved initiative to shrink class sizes.

They released me of all my OO obligations.

In reality, would you have rented it at this price to any body else if this trouble tenant didn't commit to the lease?

It citedFBI survey data that found that the city's metropolitan area had a significant rate of violent crimes: murder and non-negligent manslaughter, forcible rape, robbery, and aggravated assault.[61][62]According to Detroit officials in 2007, about 65 to 70 percent of homicides in the city were drug related.[63] The rate of unsolved murders in the city is at roughly 70%.[64]City finances[edit]Further information: Detroit bankruptcyOn March 1, 2013, GovernorRick Snyder announced the state was taking over the financial control of the city from the local government.[65] The state is requesting a review team to look over the financial state of the city and determine if an emergency manager is needed to take over control of city spending from city council.[65]On March 14, 2013, Michigan's Local Emergency Financial Assistance Loan Board (ELB) appointed an emergency financial manager, Kevyn Orr, effective on March 25, 2013.[66] In mid-May 2013, Orr released his first report on Detroit’s finances since he took the job.[67][68] The results were generally negative regarding Detroit’s financial health.[67][68] The report said that Detroit is "clearly insolvent on a cash flow basis

From what the Masters have stated  the careful selection of Quality, Qualified Tenant Buyers is the key to success with this acquire/release technique.The FHA  Cap for my County  is $271,000 for homes.

It will be released March 3 2015.