It would be best if you have a back up plan that allowed you an airfare back home, far easier to get a job there. In giving estimated cost of living in the Philippines, I will use Pesos rather than any other denomination, you can always convert to your own currency to get a comparison between the two currencies.
Other measurements you should become familiar with in the Philippines are Kilometers, Meters, Kilograms, and Litres.
For P15,000 a month you will be able to find something pretty decent.
Being a foreigner can make it a bit easier to rent as most landlords will view you to be a better long term prospect who will have money to pay the rent.
If you are going to use taxis you should demand that the taxi uses his meter and not provide a fixed cost for your journey, if the taxi refuses jump out, trust me there are plenty of other taxis keen for you business.
If you want to save more money catch the jeepney, they are very frequent in all cities and are user friendly.
It is not always easy to change a lifetime of thinking but it will be helpful. Not really trying to be silly but you have to understand that your money can go as far as you want it to go, or if you are frugal not far at all.
The electricity is 220 volts so if you coming from the US you will need an adapter.Have look here for information on getting around the Philippines Either way you should budget about P3,000 per month.The cost of living in the Philippines can increase dramatically if you get yourself a driver.I prefer to use taxis and jeepneys for short trips and hire a driver with a van for longer trips other than where I may need a ferry or a plane.Food and groceries are not expensive to purchase in the Philippines.There are three ways which you can receive you water.Either through the mains, which is available in most major cities, via wells in the provinces, here you will need a small pump to drive the water into your home.Trying to live as cheap as you can, because that is all you can afford, is destined for an unhappy outcome.Your motive for living in the Philippines must be more than it just being cheap.The final way to get water is to have it bulk delivered.The Philippine Long Distance Telephone Company (PLDT) provides phone services throughout the Philippine islands and they supply both local and long distance phone calls.