About the Land (buying of), there will be those on here who will disagree with me, but personally I would NOT buy anything property-related there, but rent and leave your cash earning interest here....or at least SAFE here.
If you own a house here, don't EVER be tempted to sell it to finance adventures abroad. Rent it out if need be.
I would certainly do some serious research across the various Philippine-expat forums first before committing to any such ventures.