Currently, it's fairly easy to find qualified renters. You need to pay attention to the area, quality of schools, access to transportation, amenities in the area and make sure that your property is clean and in good maintenance condition.
Boise is a great place to live and work so we are still on the radar in terms of companies looking for 'quality lifestyle' communities in which to locate. This is a college town and many major employers are already located here. I don't expect our growth trend to stop any time soon. William Green is right, the speculative investors left the area in 2006. The best thing to do is to get as familiar with the area before you buy as possible, then buy with your long term plan in mind.