The definition of qualified property under Section 179 was expanded in 2017 under TCJA to include the following real property improvements to nonresidential buildings: Roofing Fire protection and alarm systems Security systems HVAC systems So you can expense roofing under Section 179 as long as it is an improvement to a commercial property and meets the Section 179 criteria. 

Is there any place within the unit where you could add a through-the-wall A/C unit such as a ductless system or a window unit in a wall sleeve? 

Use a reliable customer relationship management (CRM) system to manage and organize your investor data.

It takes a lot of time to get systems and processes in place.

On the construction side I have an advantage because I'm a very experience contractor that can handle multiple big or small projects, specially out of state.I started now because I got all my systems in place!

Is a solar pool heating system a wise investment?

We have a lot of traveling nurses coming for the UW Hospital system and furnished rentals on mo/mo contracts pull a lot more than your traditional LTR 12/mo lease.

I'll post it too, not sure if thats allowed here.https://www.seattletimes.com/opinion/editorials/how-to-end-the-dysfunction-in-seattles-affordable-housing-system/How to end the dysfunction in Seattle’s affordable housing system | The Seattle Times

We have a system at our brokerage that might be close. 

The key to having great financial systems is the setup and systems: If you get everything structured properly up front, you avoid most of the ugly problems many RE investors face later on.I'm not an accountant nor a bookkeeper, but I have great recommendations for both!