We use Trusted House Sitter.
Find Pet Sitters & House Sits Worldwide | TrustedHousesitters.com
They do both house sitting and pet sitting. We went on a cruse for 4 weeks. A couple we picked, moved into the house and took care of the dog and cat. They took great care of the pets and sent pictures to us. The house was spotless when we returned.
The people who do this are vetted, have background checks and list references. Best of all it's free. You join the for a few $$ and your post the dates you need a sitter. The web sites sends you the names and information on the people interested in sitting for your pets. If you don't like any of the first group, you can request more names. Look at their pictures, review the past sits, review the references and make your pick.
We had people from Mexico City, Sydney Australia, Canada, Arizona, Ocala, Miami and several more I can't remember. It may not be for you, but take a look at the web page.