I'm living proof of someone who can make a handsome living with blogging. A lot depends on how consistent and persistent you are. In my case, I was working almost 14 hours every day for 4 years to reach this stage where I'm earning more than $40K/month from blogging. As the online space has matured, now there are more opportunities to make money via blogging. The only thing is, you need to be consistent for almost a year before you start making decent money to quit your job or to plan your life on blogging income.