@Jeremy Kleier I currently rent out a spare room in my house in Denver and I might a pretty good chunk of change from it, and it's only one room compared to what you're thinking of renting an entire unit. I think it sounds like a good idea. I've only had good experiences with Airbnb so far (I started renting out my spare room last May), I haven't had any destructive or worrisome renters (the host/guest reviews come in handy because guests won't be accepted to hosts' homes if they leave a bad impression), you can set your own cancellation policy to ensure you still get paid even if guests don't show up (which has never happened to me), and I personally think it's less wear and tear on your home because they're not living there permanently and most guests are usually out and about exploring the town during their stay. The only downside I can think of is the increased cleaning due to higher turnover of guests vs. permanent renter (but you can always add the cleaning fee to the reservation amount if you want, I just add $10 to every reservation for my time). If you have any questions, I'd be happy to share more of my experience.
Tara