When will you quit your W-2 job?

[Ron Gallagher]

I am curious what other real estate investor's thresholds are for quitting your W-2 job?  Mine will be when I reach the point where I am making $5000 profit in real estate per month.  I looked at all my spending on mint.com and on average my monthly spend is $2200 a month.  I'll add in $300 for health care premiums since I will have to pay for my own health insurance, so I'm estimating a monthly spend of $2500 or $30,000 a year.  If I make $5000 a month off my rentals then I will be making $60,000 a year which is twice the amount of my annual spend. 

How much money do you feel you need to make in real estate before you feel comfortable quitting your day job?