Likewise with any established investor or business owner.

Personally I'd establish the number of residents legally allowable and if they meet that not get involved with the age of the occupants.

Marketing as a true TK investment without being able to list may be very difficult, especially if the Seller expects these other conveniences normally associated with a TK investment.It would seem to me that trying to work with already established national TK companies like Norada or MemphisInvest may be a solution.  

Establish relationships with more than one bank (and don't just look at the big banks).3.

They can note when they sign that the stove is a 1970's electric top with rust therefore establishing they would not be required to buy a new Wolf gas stove if one of the burners fails. 

We want to go with a local financial institution to hopefully establish long-term relationship.

In the state of IL would a landlord be considered violating any tenant's rights by requesting established tenant(s) to undergo a new rental application process as if they're a prospective new tenant that will now determine if their lease will  or will not be renewed  with the possibility of forfeiting their security deposit?

You have several areas that show you're a real person and your credibility, most carrot sites (or any of the other options) lack that. 

I would like to create multiple LLCs to protect my properties.  Can anyone recommend good LLC attorneys(and economical) in Tampa area? From what I understand this law firm will also pose as official LLC representative...

If they ask their attorney for leads on agents or people who are good to work with, it would be advantageous to have established prior rapport with them.