According to this, Solo mining with 4.86 TH/s is extremely unlikely to earn a block reward. (using a couple Apollo miners from FutureBit).
The odds are so low that it would take over 1,500 years (statistically) to find a block.
Pool mining is a much more practical approach for smaller miners, as you contribute your hashpower to a pool and earn proportional rewards based on the work your miner performs.
But we do it for the cause, the #bitcoin cause.
