trust me, stick with it.
The economy sucks at the moment, unemployment is high so people do highly skilled jobs for peanuts. Spreading your eggs in the basket called the internet is the best way to spread your risk.
If you can get a 9-5 job, i say you take it. Why? you're getting $1400 a month from your sites, with average to little work. I'm sure if you take steps now to make it easier to manage etc. then it'll take less time. Then you have security, and an extra income.
Use the extra cash to try things outside your comfort zone? maybe spend $200 on PPC for some CPA campaigns or something, hire some writers for some blogs you are creating etc. You never know till you try.
Maybe you'll hit it bit and get one of those products that just sells no matter what, and if you had $300 in PPC, that can easily go to $2000 for some high value products! (talking aff marketing, not CPA sorta offers)
I've only ever had my fingers burnt with PPC, so i stay away, but i advise you to get any job, buy some cheap vouchers here, try some some PPC/CPA/CS/ANYTHING and see what happens.
Maybe you'll find something that makes you even more, for less work, and you enjoy. Then who's laughing?
Never give up. I gave up on IM (even if its just temporary, i don't know yet!), but i will never give up on the accumulation of assets and wealth!