Exceptions to the 2% rule?

[Hen Ley]

I'm looking at purchasing a single family home as a rental in the ski/resort town of Sun Valley, ID.  Based on the asking price, it falls short of the 2% rule, instead coming in at about .5%.  I know their are some exceptions to the rule that still make an investment worthwhile-  oftentimes these types of areas do not have a huge amount of growth and are actually restricted in growth because of the limited land to build on, which can drive values.  Sun Valley's property values are also below some other comparable areas, such as Jackson.  Any insights about rental investments in these types of areas would be helpful!