For illustration purposes if there's a block of identical homes of the same vintage and one was just renovated and you intend on renovating the same vintage home to the same specs (and was of same pre-renovation condition), you can make reasonable assumptions.

Have your agent verify all pertinent information and provide video walkthroughs of the property and community. 

However, if the FL LLC is set up with a WY LLC (or other LLC that does not disclose the identity of its member/mangers), then anonymity can be achieved.

Come with DATA, not with claims that in no way shape or form can be verified. 

We also verified that he is the subject listed on the police reports.There is a long list of other issues.

Verifying last 2 years of rental history very important!

While there are some exclusive pocket listings, my advice is to work with a realtor you trust and verify their licensing credentials.

There's pockets all over the greater Tampa Bay Area that are B class and up but balancing that with a decent cap rate is going to be tricky unless you either have low cap rate expectations or are will to do value add to the property or being more creative such as using a short or midterm rental strategy or even room by room with padsplit.2) Verify as well the 1031 is going to allow "like for like" into a single family. 

It's my business, my passion, and I guess my identity :)

First off  you have a CRIME FREE /Drug Free addendum on each tenant that lives in your rental.If you notice suspicious activity or have reports of the same you give tenant notice of high traffic / volume of people to unit as notice to cure.. if this continues or you see or smell drugs you give notice of non-compliance and lease termination. yes you can ask police for advise.. but your main goal is to limit the calls police have to make to your property so you don't want to be listed as a nuisance property. but if the issues warrants it yes call the cops and if a neighboring unit is worried tell them to call the cops sometimes you have to have a record of police calls to verify the issue so you can write up infraction for eviction action..