I don't think you can find a universal answer, everyone's experiences are different. The take-away point here is that you should know it might take a while to

I don't think you can find a universal answer, everyone's experiences are different. The take-away point here is that you should know it might take a while to make money & don't count on it being quick. I started making money within 1 month of quitting my day job to work on my project (product, not freelancing), and just about now (~8 months in) it's starting to look like it's making enough money to live off of in the long term (I was living on savings before that point). Another thing to take into account is how much money you need to support you working full time. I'm 28 without dependents & living in Vienna, so for me that sum is a paltry (relative to someone living in SF or NYC) $25k/year.