Renting out your vacation home for extra income is much easier with the internet.
Check out “Vacation Rentals by owner” http://www.vrbo.com.
I used the site to find a rental in Paris for my big vacation last summer. But it also has a huge selection of vacation rentals in Arizona. For example, in McCormick Ranch where I live, over 30 vacation rentals are listed.
There are many similar sites. Just search for “vacation rentals by owner” or similar term.