This is probably going to be your best bet. It’s not exactly hospitable, but existing earth technology is sufficient to keep you alive there indefinitely. Plus, Spirit, Opportunity, Phoenix, and Curiosity all live there (and they are some of the coolest robots in our solar system). As with all extra-terrestrial travel, there is a significant dollar amount attached. Presently, it costs about $10,000 per pound to send material to Mars, so you’re probably going to want to pack light and only bring along very small pets.