That's possible, if you have experience and are good at what you do. Taxes and other social needs will subtract from that. California takes about 10%, Feeds take about 20%, social program payroll fees take about 8%, retirement savings /should/ take 15%, and health and dental insurance are probably paid paid for you but not your family if you have one. Rent starts at $2500 per month for a minimal space in a bad part of town. Also, almost all open offers I've seen offer three weeks of combined sick time and vacation ("paid time off".) Also note that this assumes actual programming capability -- not just configuring existing platforms!