The Czechoslovakian Wolfdog is a DOG, not a wolf. While it's true that they were bred by crossing back to a wolf, they were mainly originated from German Shepherds, and at this point have so little wolf content, that they are considered a recognized BREED of dog by kennel clubs throughout the world.
Honestly, I don't understand why anyone would want to own a pure wolf when even dogs that have zero wolf content (like Akitas and Huskies) are hard enough to own. It's also hard just to own and house a wolf hybrid (a dog crossed with a wolf, with high wolf content) let alone a pure wolf, and often times it's illegal without having inspected properties and licenses.
I would check out this website (
http://wolfpark.org/wolfdogs/guidelines.html ), it talks about wolf hybrids and how much work it takes to propperly house and own them. I would do a lot of research if you're really serious about this, and you would need to have tons of dog experience, and actually meet these kinds of animals in person and talk to professionals about them. It's a major underaking that shouldn't be taken lightly.
Wolves are wild, not domestic animals.