I hope the example illustrates why HELOC to finance ADU is not optimal not even addressing the risk of a variable longer term loan (I do not use variable on longer loans) or additional interest rate (these are secondary issues but I would have issues with HELOC even if the HELOC were fixed at the same rate as a new RE purchase loan (but HELOC are typically variable with worse terms than RE purchase loan). 

thank you for great suggestions, Jonathan.are there any web solutions or systems out there to collect rental payments?

Any and all advice is welcome on self-managing-- I have the majority of this squared away (my team is pretty much in place, I am just worried about how to make myself available for issues that arise and how to best optimize my listing.) 

Look into the homes history on your county's web site(s). 

Not saying that this is the case but that is the darkside of the Web 2.0 world we live in today.

@Hannah Potter Here are the things that many CPAs support their clients with:Understanding tax impact of short-term vs. long-term vs. flip before you buyWhich entity structure is best for goals and investment property typeTax and compliance on LLC or S-CorpHow to transfer property out of personal name into LLC (hard to buy 1st through entity)Ways to optimize taxes throughout the yearHow best to set up accounting to track income and expenses (doing this late is a mess)Feedback on property management systems, accounting systems. systems, etcEstimated payments to avoid penaltiesKnowing when to file and getting things in on timeMaybe a few things I missed, but this is the high-level ….. if you can get answers to the above questions on your own, plan, and file your own taxes then you can avoid the expense of a CPA.

Seeking guidance from reputable professionals specializing in real estate taxation is crucial to ensure compliance and optimize eligibility for REPS.

Thats the number im currently focused on optimizing. 

The second branch of the site will be a platform to create a personal web page that will hold all of the agent's social media link (kind of like linktree).

Before you run any ads on Facebook, make sure your website and all OTA listings are outstanding and recently optimized.