He is in a painful spot with his cash flow and likely his bank.

@Kristopher Sharpe Once you are already connected with your tenant, they can easily send you a message in TC Messenger and attach the needed documents.

I feel your pain.

For my business, I want to make it more painful for my customers to do business with my competitors than it is to do business with me.

Trent Armstrong with Iberiabank is a very sharp guy that could probably answer all your questions when you're ready to move forward.I can not speak to which market would be better for your rentals as I am not familiar with OK, but I have been studying the NWA market over the past year and currently reside in Bella Vista.  

Either single pain windows or failed dual pane system.Like @steve o said these should be replaced.

It’s been brutal here in Denver for sure, and working with buyers in this market over the past few months I definitely feel your pain.

@Dana Sample, I cannot speak to CA specifically, but flipping is a speed game, and tenants can be a pain in the rear.  

@Edward Sharp I just ordered David Greene's book.

If a neighbor is a pain in the butt and is calling in complaints, that is really bad.