It would be helpful to know your intended audience for this deck. If, for example, you are looking for something to play at a legacy tournament you are not going to have much success with this deck. If you intend to play this at the kitchen table with a few of your friends you still might not do very well but without knowing their decks I couldn't say with certainty.
That being said, this deck is probably still not worth trying. Land destruction takes an incredible amount of effort, energy and luck to pull off. In the current state of the game it is not a viable strategy unless you can put it together with some very fast damage so your opponent dies before they can stabilize. I don't think the tims will be able to pull it off.
One thing I do like about the deck is the
Orcish Squatters/
Goblin Tunneler combo. You could turn these two cards into their own theme and protect them with countermagic (e.g.
Counterspell) or protection spells (e.g.
Mother of runes). If you can get the combo to stick it will be pretty devastating. A similar combo would be
Stone Rain/
Charmbreaker Devils although you'd need a way to ensure you only had
Stone Rain in your graveyard...