And, while "perfect" doesn't exist, "good" IS there to be found.

I don't know, but you would 100% want to check in with the existing optometrist, maybe they don't get "walk in" business anyways and do not care and wouldn't mind the like-minded neighbors (I've had mortgage neighbors before, and do not care -- I do mortgages they don't, case in point office mortgages across the country, so I wind up getting business from them), but an ice cream shop is going to be LIVID if you rent the unit next store to a frozen yoghurt shop, since that's a LOT of walk-in business that's now getting split two waysAnd then to make it really fun, here's the question I'll throw back at you.

What is private property and does that actually exist anymore? 

I have talked to hundreds of clients regarding real estate lending, and a lot of people are still not aware of what is out there!  A couple quick examples of products available you might not know about!30 year fixed, ...

Existing tenant quality is subjective, and unfortunately, obtaining existing credit reports from prior owners may be hard to obtain.

I doubt they will pay, but at least it's an early exist to get the house on the market quickly.Thanks so much for the perspective and advice!

(How to deal with existing mortgage during the gifting process... prefer mortgage gets paid off, rather than become part of the gift.)Much thanks

You need someone who clicks with you personally before engaging in a mentor/mentee relationship with the dedication and stress that may be involved.Where to find a mentorStart by looking within your existing network.

By using existing structure, the cost to add the ADU is reduced.  

Existing contracts transfer with the sale of the property.