Although you asked this way back in 2010, I have just started to use Trulia as a realtor and thought I'd answer your question. It would always be prudent for banks to consider what percent of the condos in a condo complex are rentals. Many condo complexes have a percent that they will allow for rentals in order to keep the community in good condition. It would also be important for mortgage lenders to consider the reserves of the condo complex, since this, in part, defines the condo development's viability. This being said, I'm sure there are some lenders that are more careful about this than others. It would depend on the particular lender.
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