About $1k USD. The best spot to live imo is Gramercy which if you use
https://www.siglosuites.com/ is 50k for one month in a studio ($980), or 55k for one bedroom ($1080).
That's cheaper than Airbnb for one month. Airbnb is good for daily or weekly. $40 a night roughly for gramercy. Monthly they might give a 10% discount but some listings don't, and Airbnb charges a service fee so usually siglo suites is cheaper.
They have some other high end condos on Siglo too but I prefer Gramercy. Good internet cos it's in a PLDT fibr village, best gym, attached to a mall with it's own private entrance, guards don't stop you with a girl (or use the mall entrance in daytime). Walking distance to the red light district of p burgos, royal nightclub, pasha restaurant.
On a 6+ month contract it'd be $600/month.
Still ok but expensive relative to e.g. Bangkok where it'd be about ~30% less. And electricity is also a lot more expensive, highest in Asia, 5th in the world.