With properties sitting vacant in those good areas I can look at it and most times spot the issue (bad sightlines, bad access, bad building design, bad parcel layout, stuck behind other buildings, etc.)

He confirms for me that the things I'm doing and the strategies I'm implementing are good ones, and gave me some really great advice o how to be more successful.

Hi I manage a few AirBnB rental properties and in need of reliable local companies for cleaning and structure repair work don't want to pay an arm an a leg for cleaning.1 of the buildings doorman recommended this company:Carpet Cleaning NYC829 Park Ave New York, NY 10021https://topcarpetcarenyc.comCan anyone recommend or confirm

Be aware though that there are many modular companies and some are more expensive than design/build custom ADUs.I would also agree with with Andrew, a conversion of an existing space (like a garage) might be the cheapest.Also, check with your city laws on what's an allowable ADU to construct based on your current home and rental regulations for them.Collin

How do you handle the design aspect; do you hire a designer or do this yourself? 

I aint going into it - it requires a much longer novel to explain the diabolical environment that has been designed and implemented and all the people who are complicit without their own knowledge.

Check with your lender and CPA to confirm this will work in your particular situation.

I had a friend drive by the house and confirmed that someone is in fact living in the home and took pics of the exterior for me.

In the meantime, I'm an experienced registered Interior Designer who is willing to help with completing on trend "investment conscious" flips.

With a business that is so heavily dependent on reviews, I can imagine (and my friend has confirmed) how hard it would be to manage other people's properties.