Hi - Only 2 condos have sold in The Heights of Lebanon in the past few years (I was one of the agents who sold one of them). To answer your question, YES, it does matter that a large portion of the units are owned by one entity (the builder) and are rented out. It does not conform to regular lending guidelines, and therefore must be purchased under a lender's portfolio product. There are other considerations you should keep in mind too.
I am happy to answer any specific questions you have about the complex, as well as share my experience my buyer's had when purchasing a unit there.
Jessica Wormeck, Weichert