I love your spirit of adventure, but I respectfully disagree with letting them have our home. We can’t feel like running when they infest our lives.
We need to have BOTH places.
Thoughts:
1. Terraform Mars. It’s a planet, and it’s close.
2. Colonies on the moon. Free of most Earthly reach, still close to home to be possible with today’s technology.
3. Orbital habitats. Possible with today’s technology, though satellite destroying weapons pose a risk.
4. Europa - it’s got water.