Prepare to show detailed documentation of your STR performance, but keep in mind that consistency matters, and some lenders might prefer a more extended history.

To clear things up for you: Rental real estate activities are default passive in the eyes of the IRS. 

Gang activity, drugs, homeless etc.

Alongside my academic pursuits, I also helm a reputable research firm, where we analyze market trends, identify opportunities, and deliver actionable insights to our clients.In line with my passion for real estate and my background in finance, I am actively seeking opportunities to collaborate with like-minded investors on commercial real estate ventures.

It would blow your mind how far a free lunch for people can go.

Keep in mind once the ADU is complete your old unit will most likely become RSO which will mean any alterations are much more complex and limited.The downside of this route is that if you build the ADU now and your old house is built before 1978 you cannot split the lot because the old house cannot be on its own lot once it falls under RSO.

You will have to become active and join a firm (affiliate) where you'll have oversight, and if you want keys to the kingdom so to speak, you'll have to subscribe to your NAR MLS, perhaps your commercial board, and all the memberships your firm requires. 

Quote from @Josh Mahan: Well contrary to your opinion I have not already made up my mind to make the investment.  

We are active in both residential and commercial.

There will never be a "perfect deal" in my mind, but something that works best for them at that time, and something they have the upmost confidence in is ideal.