I wish I started in my 40s because could have quit my corporate job already.

If you get a title policy, it will insure your leasehold interest not a fee.Also, I believe there's no HOA, only a BODs of the corporation that handles its administration. 

The tenant is under no obligation to enter into a new lease with you.

If Buyer obtains a loan for any part of the Purchase Price of the Property, Buyer acknowledgesthat any terms and conditions imposed by Buyer's lender(s) or by CFPB Requirements shall not affect or extendthe Buyer's obligation to close or otherwise affect any terms or conditions of this Contract."

Freedom Loan Services Corporation. 

There are a few reasons for this: 1) They are costly and the Exchange intermediary may require a whole host of inspections including environmental reports etc and 2) One has to come up with the cash to buy the new property without getting the equity out of the first property - not everyone can do that - add in having to get a loan while still being obligated to the loan on the “sale” property.

As in what obligations would I have that would require me to stay with you as my mortgage broker? 

I am new to real estate investing, I have not talked to a lender for pre-approval because I am in the beginning stages of learning.What is the best business structure to use for a rental property business, Sole Proprietor, LLC , or corporation?

When classes are used as Properties, this is more on the corporate level accounting.When classes are used as Units, this is looking at it on a property level accounting.

Also ask the local corporations and government agencies who they use for setting up corporate housing.