This would be a big concern of mine. 

I am less concerned about the rent but more about how crafty and authoritative this young couple is, I am trying to evict them but because of how friendly NJ is, I'm unable to do so, here are the following areas they are in breach of the yearly lease:1.

Why be concerned if the agent is getting you a better rate?

That would be a concern to me.

My concern is that my DTI is not great and I won't be able to get a good rate or pull some of the equity that the home will more than likely have when it is complete.

This helps a lot, my cpa was concerned about these investments in our name.

Seems like age of building and renovations is a risk and concern to you.

@Gary Northcutt personal finances are less of a concern on larger commercial loans with a typical down payment.

The property is the primary concern and they want to make sure the property will at least hold it value and they will be able to recover their losses if you default.  

Get a contractor friend to walk a property with you, and give you ballpark ideas on what needs fixing, how much it should cost, and anything else they see that would concern a buyer.