This is what I want this deck to ultimately look like. What do you think of this deck? What would you put in the sideboard? What else would you put in this deck?
If you're looking for cheap haste creatures, there's rakdos shred-freak . There are also a couple of good tools available in gatecrash that you might like. I'm thinking a certain goblin...
For a competitive, budget deck, you should probably stick with RDW. Being mono-Red, it saves you the touble of having Shocklands + Coreset lands. And you don't need any Planeswalkers. I think the only pricy cards are Stromkirk Noble (a 4-of), Ash Zealot (a 4-of) and Hellrider (a 3-of). The rest are commons/uncommons. As an added bonus, most of the creatures do have haste.
If you're going to do the whole +1/+1 counter thing, most cards in your deck should work around that. Silverfart, Rancor and your Boar don't do counters: they just GET/Give +1/+1. Not counters. So consider that.
I highly recommend Ghor-Clan Rampager and Wolfir Avenger . Read up on Ghory there, he's already got quite a bit of literature on why he's awesome. Avenger has flash and regenerate. Flash is almost haste, with a bit of a different flare.