My interest rate is already high due to my recovering credit so what am I protecting?

My interest rate is already high due to my recovering credit score so what am I protecting?

If I give 300 k she will hold the note of 500k .Thoughts, feedback ......Public sewer and water. 

They may have systems in place to protect the return.Also is it CoC, IRR, or Total Return?

**I used all your numbers, public info from the Bigger Pockets mortgage calculator and public info on the Williamson County Tax Assessor's website.

But I do agree with investing in an area along a good public transit line into Camden, and starting checking out along the River Line, specifically Riverside, NJ. 

Have purchased two properties like this which never were publicly put up for sale.

I have one 4-room house for students in a smaller, Southern public university market (heavily commuter, growing its out-of-county population) and I don't quite understand the timing of this particular area. 

Have you checked the public county records to see what the property is listed as officially?

Yes that is very normal, every Real Estate Association PMA I've seen has that same clause to protect the Broker.