I really don't recommend relying on teaching for income, without some sort of a cushion. Through an institute you should be earning 45-50 pesos per hour, and 70-80 through private students. However, two things you should remember: one, your actual teaching availability is limited by travel time (which you do not get paid for), and two, it's a notoriously unstable field -- so if you are living paycheck-to-paycheck, the loss of one or two students (cancellations, vacations, etc) can take quite a bite out of your monthly budget. 3,500-4,000 pesos per month is nothing anymore... it'll cover rent and groceries, but what happens when you need to buy new clothes, your laptop needs repairs, or you want to get out of town for the weekend and need to buy a bus ticket?