Looking at the outside shot of the home, I can see that the roof isn't in perfect condition... it's either really old or structurally there's something wrong with it and I know roofs are a VERY expensive thing to address.

If the RE properties were in your name(Not in LLC) and it was rented directly to medical practice as your capacity as an owner, there would be Self - Charge interest rules, but I am guessing the ownership of the RE properties is under LLC whose business activity is rental, so those rules can be bypassed if structured carefully. 

Can it be done without their service, is it an efficient and effective method to collect data "real time" in one place with enough value to warrant the monthly fee?

I like how you structured that.

Bigger Pockets is a great start toward getting deals done correctly and reaching out to seasoned real estate investors, especially if you would like to start out using the BRRR method as you have specified in your post, Nick.

., I did not end up using them, as I’ve still to list the house in any method.

What is the typical open group structure?

Their compensation - cut, commission, profit split, trailer fee, "whatever you want to call it" - can be structured in many different ways.

Oaklyn and Audobon are great towns...but I don't know that they'll ever be able to compare to Haddonfield, Haddon Township, and Collingswood without some major structural changes to the layout of the town. 

What has been your most successful method in finding deals?