I don't want to sound like a cynic moron, but with wife and two kids, having a business dependent entirely on Google is just stupid, sorry to say.
Client work, as suggested above. It sucks, but it pays the bills. Get back into positive cashflow first, think about starting something new later.
I don't agree with that...simply because you could apply the same logic to ANYONE who works a single job.
For example "Income dependent entirely on (insert company name here), is just stupid."
Anyone working a regular job works for a single company. And they could get laid off/fired at any time, and then their income would be gone too.
Point is..relying on Google is not any more of a wrong than "average joe" relying on the one company they work for.