Newer Sterns and JJP games are about the same on maintenance, so that shouldn't be the big consideration.
If it is your only game, then you need to make sure you love it.
The Hobbit can be a polarizing machine when it comes to game play. Generally it is a long player, with lots of multi-balls. This is very different than TWD, which can be brutal, and the ball times are much shorter.
Which do you like better? Short games that keep you coming back, or long games that keep it going for a while?
If you can't answer that easily, then you need to play a lot more before you buy something.
Definitely play the games you are considering before buying one. GL!