I'm 7 years into self employment. The key is contacts and recommendations, which obviously take time to establish.
Lately I've been doing a few new builds for a local builder which is nice easy steady work.
I guess the economy is different up here (which is why many want independance) and I would say we had our recession in 2008, and we are well past it now, at least that's how it appears to me with 2008 being the year it slowed so much I nearly went looking for a "propper job" again.
Self employment works for me however, only because I have no mortgage, low cost of living and other income as well, so I never need to earn that much from sparkying, and never intend, or indeed need to work full time all the time. If I had a mortgage and no other income, then I would still not be earning enough as a self employed sparky after doing it for 7 years.