If the word liveable is applied to a building, area, climate etc it means that it's fit to live in. When applied to a life, it means one which is worth living and when it's a person, they're someone you can get along with.
The ease with which these things may be achieved will depend on the standards of liveability which you demand.
If you like you can also spell liveable as livable.
Gary and I happily spend months at a stretch in the van, which just goes to show how chock full of livableness we both are. Especially me ;-)