Just saw your questions, you can find most of your answers in the NOLO state guide to landlord laws.

I got to my current financial success through a series of well thought out endeavors but with a massive sink or swim element as I am often self guided..."

+1  Real Estate Investing Data and How-to Guides - This here shows that you can filter to Multi family but I don't see it as an option as well.

From what I’ve seen, firms like Exeter 1031 Exchange or Asset Preservation, Inc. have solid reputations for guiding investors through the process efficiently.

The title: The Pro's Guide to Property management Less Stress, More Rent, with Amelia McGee and Grace Gudenkauf. 

That might be the biggest hurdle - but otherwise, I'd check out "DSCR Loans" which are the perfect option for people like you looking to buy rental properties w/o W2 or DTICheck out this 12-part guide published here on BP all about this loan option!

Here's a detailed guide on how to screen applicants: Application Screening Guide

Using local banks to help guide my direction as to how their loans work.

My questions and points can help guide that conversation.1.

I have read the city’s guide https://www.slcdocs.com/Planning/Guides/ADU_handbook.pdf but I still have questions.1. can tell that till require the owner to live there for the ADU. 1a is it for permanent residency or is it justified if it is a second home that I would use occasionally?