“One important thing to be on the watch for when looking at condominiums is something called the investor ratio. The investor ratio is the ratio of owner occupied unit vs rented out units (also called investor units.) If this ratio is too high (typically above 50%), you will not be able to qualify for a typical mortgage.”
We just did a (too) long article on investor ratios in condominium complexes and why it matters. It explains what it is, how to find out what the ratio is, how it is calculated, why you should care, how it affects prices etc. See the article here http://soldsense.com/2014/03/06/investor-ratios-and-why-you-should-care/