Constructive criticism: you are causing your own problems.You played social worker/charity organization, so the tenant No longer sees you as a landlord or business.

How do you all save your rental property documents, handle receipts, and generally stay organized with your paper work?

Keeping that organized is one thing, but adding in tracking finances, teams & people, projects, etc.

Would you recommend those organizations for learning about affordable and sustainable housing?

Learning is earning, so keeping a student first mentality will be crucial to finding success in this new year!

I have a carpentry background and do most of the work myself, thus keeping on track is crucial to maximizing returns.

While there are some strong corporate players moving to Austin, from what I understand the city does not have much room to grow: where as DFW continues to see growth everywhere with solid companies relocating and or organically growing here.

Having a team that you trust and can rely on is crucial in whichever strategy you decide to go with.

The RICE model helps me think in a more organized matter. 

They only way you are going to know for sure if an organization is one you want to partner with long term is through a first hand investing experience.