This is an important point. You cannot directly compare salary to business income. The day you quit your $150,000/year dev job is the day you income hits zero. Compare that to BCC that he effectively quit four years ago.
2007 $6,200 / 100 hours / $60/hour
2008 $10,700 / ?? hours /
2009 $18,525 / 130 hours / $125~$150/hour
2010 $25,904 / 115 hours / $200~250/hour
2011 $25,000 / 35 hours / $700/hour
2012 $38,598 / 38 hours / $1,000/hour
2013 $23,000 / 23 hours / $1,000/hour
2014 $20,000 / 5 hours / $4,000/hour
Rough total is $170,000 from 550 hours of effort. Lets assume it ticks over for a few more years. You've basically earnt quarter of a million from equivalent of 3 or 4 months effort.
