Garmeon Y. because it's not a material defect of the home; assuming of course the Seller fixed it and didn't just leave it all busted up.This would be like a baseball going through the window from the neighbor kid, fixing it, and then reporting it as a defect.

We chose something a little more expensive since it was a thicker material - a little less than the height of wood flooring in terms of thickness and it was around $2.50 per square foot.

What is the best way to word the addendum so I can control the quality of the work hand materials being used.

How much does material/labor cost in your area?

And the internet helps too. 

Can someone please give me good references/materials or point me in the right direction on what to read?

Understand what you get for $3000 as this may just be the materials. 

He provided and explained all the material that he researched and how to take the next actionable steps.The next part of the meeting was a Q&A discussion about renovating a flip with 3 local investors/ contractors that do multiple projects a year.

@Christopher AnelloI have some lease option materials on my BP Blog.See https://www.biggerpockets.com/blogs/3/53697-video-...I like Bill Bronchick for Creative Financing. 

While I don't disagree that there may be reasons why one cannot advertise the property directly, I would argue that having a contract to purchase the property IS a material interest in the property.