If you're going to scalp for 4 ticks ($50), it makes much more sense to trade NQ. The 2 tick hole that Destriero is talking about is much more manageable at $5 per tick in NQ. But if you get good, its not scalable so why bother ?
Also, I find $50 a trade just pure madness unless you have an incredible amount of knowledge of how price works. Its still not worth it IMO. If ES or NQ are trending well, on average 1 or 2 days per week, learn to capitalize on those good days, and stay out of the market the other 3 or 4.
Hell, find equities that are trending the other 3 or 4 days and ride them up. But to tick f*ck all day long is just nonsense. Nobody makes money doing this.