Instead of vague alt text like “Modern kitchen,” try something like “Chef’s kitchen perfect for group meals or private dinners.”

Leave some on the bone for the end buyer.

It's hard to find a "perfect" market that is knocking it out of the park on all these parameters. 

You will never have perfect knowledge.

Finding an investor-friendly agent is key and they should be able to help you with 1-4, I'd say talking about those questions you asked would be the perfect thing to ask any potential agents you interview! 

I upgraded the “bones” of the property and the cosmetics.

Perfect, this is what i intend to do.

It’s perfectly livable!

I was made to think "if you've put this much time, money, and effort into perfecting the development of secondary suites into SFR's, why would you move your focus onto another strategy?"

They were perfectly acceptable 20 years ago, but now many areas are limited to one guest per calendar month.