Lisbon is an obvious suggestion, but I have been here for hardly anytime at all so what do I know about it:)!

Any lender licensee or realtor licensee cannot suggest to treat people differently and they can never do it in real life.

I always suggest buying fewer but better properties.

I'd suggest not paying anyone for mentorship.

If you personally are having trouble making a profitable deal, make a post and ask for suggestions.  

My suggestion would be to manage it yourself for 1-2 years, then as you acquire more rental properties, you can start using a PM. 

This is defined as 30 days or more, and you will easily find nurses, professors, students, and more than need a 1-3 month airbnb.Speaking of, you could rent the whole space mid-term - and I suggest through airbnb or VRBO but you don't have to use those.

My only suggestion regarding Junior ADU's is to make sure you understand the law and what constitutes a "Junior" ADU.

One thing I suggest doing as you do your research as well is to find a property on AirBnB that you like. 

In addition to Nathan's great recommendations, I also suggest verifying that the PMC is licensed.