Cary, I am no lawyer, but a simple answer is you use a contract that you buy or have created for that very reason.  

This change will provide more Americans with greater investment opportunities and enable the businesses they invest in to create more jobs.

@Joshua Redmond a good ol phrase to remember is "if the seller creates price then you create the terms" all of your questions are all factors of negotiate to get best deal possible for either party.

My "why" is freedom:- to chose when and where I work- to chose what I buy and sell- to chose how and when I will retire, if ever- to chose when I go on vacation- but most of all, to teach my children financial freedom and to create their own destiny.

Create a package for it and blast it around to investors on BP.See if someone is interested in buying it off you and you can do a FSBO

@Nicole A. do you know what year the ground rent was created?

Would we want to include her in the legal entity we create to handle this transaction or no - for estate planning/getting assets out of her name? 

Creating your account is a step in the right direction. 

Can you have direct conversations with them via telephone?

It creates units that are under-market.