10,000 peso's a month, you could probably buy your own home in a private community in provincial area's if rent runs you more than 3,000 peso's a month you're getting ripped, you could afford to buy a larger condo unit with a yard for sure the payments wouldn't be more than 10,000 peso's a month, down payment might be large but the place would be yours in 5-10 years.
I live south of Manila in and around Los Banos Laguna and if your wife has in-laws or family I'd go that route searching, I'd stay away from contracts and realtors at all costs and it'll cost you.
Think of your money going to pay for someone's new car or motorcycle and you'll begin to get just how badly they soak us for money, it doesn't need to happen, this is your hard-earned money.
Does your wife have parents with property, build on that, little by little, leave out all the professionals and build it yourself, little by little as you can afford it doesn't cost that much, build it out of block.