http://tappedout.net/mtg-decks/rock-fit-2/
That's my list, it's considerably higher budget than what you're starting from, but there's a few things in it that I think you can make use of.
#1 Tireless Tracker. This card is a must include in my opinion. I like running it as a 2 of. You're never going to GSZ for it, but naturally drawing it is very powerful.
#2 SDT. If you don't have these, Sylvan Library is an acceptable substitute. When I first got into the format I got Libraries first because I had (and still have) a suspicion that SDT might one day see a ban. Additionally, Library is a faster card, especially if you're weak on other sources of CA. It doesn't play as well with Deed though.
#3 Courser of Kruphix. It's cheap and it's a great combo with either Library or SDT. It's also a reasonable card on it's own, and it has some cool other combos such as with Stronghold/Arbor.
#4 Crop Rotation. It's a high risk card, it's absolutely devastating if your Crop Rotation eats a FoW so you always have to play around that outcome. However, it enables a strong land toolbox. It's a great way to reliably get the two towers going without running multiples of each, and it's also one of your best chances to win against something like S&T by using Karakas. I've been trying out a maze of Ith lately too, but the jury is still out on that. That said, get duals/fetches before getting other lands.
#5 Nissa, Vital Force. This card is just absurd. It's so good that I included it over Sigarda and dropped white. Best of all, it's inexpensive... it's not going to stay that way forever.
Edit:
PS. Don't play Wasteland. You're giving your opponents mana with Veteran Explorer, and if you add white like you're planning you'll also be giving them mana off of Path. Denying yourself mana, as a ramp deck while your opponent breaks even on their lands is not a recipe for success.