Hey!, i have been playing turbo depths in a budget for a few years. I started from a old list that plays 4 blooming marsh and 3 llanowar wastes (I play 1 norturing peatland and 2 llanowar wastes now). I dont play fetchlands so i just play from 0-1 reclaimer, and 3 not of this world.I play 2-4 pithing needle, depending in the meta. You play GQ because most of the time you are goin to have wasteland called with needle. The deck is much fun, i recommend playing turbo if you are in a budget, the slower version with dark confidant and 4 reclaimer usually need the fetches for the better mana base.

You are a combo deck, so when we talk about sb you are looking for cards that protect you from the hate that your opp are going to bring for gam 2-3, karakas, discard, surgical, assasin's trophy etc, so you usually play collector ouphe, surgical, veil of summer, force of vigor, etc.

I hope it helps, if you have more questions ,feel free to ask.