Is there any supporting documentation that I could have the current renters fill out prior to purchasing the property?

Can I still use the same lease document which I used for my other tenants till now?

Document thoroughly.

Here's the latest piece I found on Jackson County suing to undo the court order finding the assessments were illegal: https://www.kansascity.com/news/local/article291980175.htmlYou can also check out some of the local news stations like fox4kc.com and KCTV5.com to keep up to date on what's happening with it. 

Define and Standardize Core Business ProcessesA scalable business requires well-documented and repeatable processes to ensure consistency, quality, and efficiency as you grow.

Hana,Great question and the good news for you is you paid for the appraisal so it belongs to you and it can be used at another bank.

The previous owner did not give me documentation on the current tenants.

(adding the layer of privacy) If the LLC is owned by the holding company, and you purchased these other properties in the name of the LLC, then all of the documentation should have been taken care of between the bank and the title company.

- Should I get a real estate agent or realtor estate lawyer to help me with paperwork that because I have no clue when it comes down to contracts/documents regarding sales/purchases. 

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?