In NYC, a condo is part of a high-rise structure, and generally 20 years old or newer, and primarily in the luxury market.

People don’t want to rent out their mansions to locals for half their mortgage.

Luxury apartments in the Peninsula still raised rents this year. 

There are also plans for a new luxury apartments and a $100M mixed-use development near Medpace's campus.When this particular house came up on an online auction site, it seemed immediately appealing due to its size and architectural features.

I've even seen people out tree houses (luxury) and camp/RV parking spaces on Airbnb & similar sites.

You may have this luxury of time to see what works.  

i'm not saying that it's impossible to wholesale in those areas, but if i am an ultra motivated seller, and i need to sell ASAP, (and i know that demand >>>> supply), i will get a listing agent and simply tell them that only cash offers will be accepted.  

I am digital marketing manager for a luxury automotive dealership and I am planning to pass my real estate license in the next 90 days.

One luxury, one in the middle, and one teeny-weeny very basic 2-level place.

At some later date, if things turn bad economically and cash flow turns considerably negative, then you might not have the luxury at that time of being able to refinance.