You can create an addendum.

I also considered creating an LLC with my partner but then my mortgage broker said that they do not refinance with LLC’s (we were planning on using the BRRRR concept).

That has come up in a few recent podcasts about the need to create good deals as they are increasingly hard to find.I tend to focus in the same areas as you and have had the same dilemma, lower the rate of return you are willing to accept, or wait it out. 

I created this document and want to email it out to contacts but would like to get any input to make the information more impactfull yet concise.I'm open to any suggestions.Thanks everyone!

This is where an attorney would be able to advise if you've created any sort of contract by accepting that money.  

This is taken straight from creating a profitable marketing message from business training I am going through."

Their customer service has been wonderful in my experience.

I've recently formalized my business by creating a corporation. 

Both parties should review and sign and this creates the baseline conditions. 

My general rule for holding property is to create an LLC within the state where the property sits.