Along with negotiating the feasibility period and due diligence periods I'd concurrently do 2 things based on your plan:1. talk to the solar companies in the area and understand their site selection process, how they structure their deals, how they operate, etc. 2. talk to the power company and see if they need more renewable energy and if building another solar project in that area makes sense. 

I'm in the process of looking for a property for a STR and property management groups and Realtors make it so hard for people interested in the property.

If you are planning on living in the property as your primary, you can request to terminate the lease as you will be taking possession for owner occupy, but confirm with a local real estate attorney on the specific verbiage and process as it varies by state. 

Consider how that might effect the future sale of a property.The real estate agent or broker who is helping you buy a multi-family property should understand the pros and cons and help guide you through the process of where your money is best spent regarding washers/dryers.

Quote from @Kevin Barry:  Not exactly sure how this would work to make sure we are taking advantage of the loss reported for our own personal taxes.Good news:Your understanding of the process is correct.

To give an update I've been in contact with the 3rd party company Obligo, which explained the process better but they will be deducting the $2000 from my account within the next few days to reimburse them for what they paid the management company.

We are new this process.

Set expectations on paper for maintenance and repair process.

On the other hand if they are a sponsor that is experienced in stopping a skin in the game, that's a huge red flag for me.c) how open to scrutiny are they?

They constantly "lost" emailed documents, dragging out the approval process.