A debt snowball is a great first step for eliminating debt, which improves the credit score.  

We have zero bad debt and 800 on credit scores, but maybe that doesn't matter for these kind of purchases?

Does the existing paperwork that has the old owner on it transfer to me or do I need to prepare a copy of that lease and have everyone sign so it's "legal"?

I have an LLC, but have recent debt that affected my score...

Assuming all rents are substantial they should be able to cover my debt service and any other expenses needed (repairs, water, vacancy, cap Ex, etc.) 

Then I also have asset protection that limits liability to each property and other layers of legal protection that makes it unattractive for a lawyer to try to pursue anything with my business structures.

Do you have equity and debt to build the project already in place?

I had read some articles online that even in joint tenancy, where multiple people own and are on title of a property, only the individual(s) legally obligated to the debt (i.e. named on the mortgage note) can deduct the mortgage related expenses (interest).

The ending should read ****THIS is not legal of advice. please consult an attorney.

Our partnership agreement is that we both are responsible for the everything, 50/50.The question is, How do we put the title into an LLC, legally so the bank won't be able to call the note?