The main thing is to screen your applicants in a consistent manner, Section 8 or not. 

The book heavily investigates the 18 year cycle and it's actually really compelling and eye opening.

Safety issues can compel you to do this, ideally if you can get a township inspection to say so.

BUT, the mere fact that you are attempting to place a lender in a position in which they will now ostracize all other non-LGBTQ customers is a clear violation of the same regulations put in place to protect you and all other cousmers in the first place and is why they will decline to work with you in this manner... you are forcing them to encroach on the rights of other cosumers to access their services, which is a violation of the cosumer safety regulations impossed on them.  

Were the properties repositioned and capital returned in a timely manner?

Focus on performing your day to day operations in a manner that will reduce the risk of claims in the first places such as hiring reputable service providers, sign contracts each time you engage a 3rd party vendor & collect insurance certificates where you are listed as additional insured from everyone who performs work on a property you own or provides a service related to a property you own.

., “net worth”, in the best risk adjusted manner possible? 

You've probably heard of big Landlords losing property, but only because they were flagrantly violating Fair Housing, running a slum, or otherwise violating the law in an egregious manner.

Create a compelling template, possibly offering them a discount if they sign by "X" date. 

Honestly, in what manner to get started is based on a bunch of factors, which I'm not sure if can cover all here.