The upper east side is growing extremely fast. There are still many single family homes.
Building that allow multiple rentals would benefit you most. There are many units that are already rented and the leases end shortly -- you can buy while occupied. Visit and then re rent.
Hoas differ drastically by pp square foot and the amenities of the building.
Belle Mead Boulevard is located east of Biscayne in an area called the upper east side. The area is growing rather quickly. However, there are still some parts of the area that need to be revitalized. However, lucky for you, Belle Meade is located in a gate area of the neighborhood with a 24 hour guard booth. It's a wonderful neighborhood and I believe is undervalued.