One job means you get fired and you're looking for a new boss.
10 clients means if one fires you, you still have 9 you're hopefully keeping happy.
I try to follow what I read about Gates starting Microsoft in some Biography. He tried to keep 2x the salary of all the employees as cash on hand, so if something went bad, they could try to weather the storm as long as possible.
So before hiring anyone as an employee (including myself), I do this with my startups. (I work 1099 in the beginning as well and I fire myself [work without pay] first).
Getting laid off lets you know where your loyalties should lie. The circle of you, is what I call it.
Each circle goes out from there. For me that's the circle of my wife. Then my immediate family. Etc.