I had written before about opportunities with the construction of the LRT Line 2 Extension along Marcos Highway and the MRT Line 7 along Commonwealth Avenue, Regalado Avenue and Quirino Avenue. There is a nice article that came out last April 28, 2016 at the Mobility Lab site:
I am afraid though that despite the developments further north of the Line 7 alignment, it seems land values have increased thereabouts. This means homes there will likely be as expensive as those near the city center. Only, the residential units in Caloocan and San Jose Del Monte are low density (e.g., single detached houses) and not medium to high density (e.g., walk-ups, condominiums). The government should have also invested in land and residential developments like how Singapore did it. HDB-type developments could have made the difference in as far as prices and rent are concerned. This could likely made it more affordable to workers seeking homes to purchase or rent near transit stations.