Yep, I was spending about 40k a month in the 18 months I lived in Manila. So obviously a lot less is possible if you are living in the province. Even then, I really could have gone much lower if I'd known what I know now. The main thing that I saved on were not using taxis and eating Pinoy food.
The most disappointing aspect was paying through the nose to use facilities than you could find at your local leisure centre in the UK. The masses are really poorly treated on that front. No wonder the Philippines hasn't won any medals at the olympics in years and years.