If the combine income is $12K, ever consider EC?
Afterall first timer had some grant,
$30K for <$10K income
$20K for <$11K income
$10K for <$12K income
Came across Standard Chartered, somehow they had a special housing loan package that only offered by them, you can check with the banker for more details.
So far, most of the people that I know used DBS house loan as it provide the lowest fix + SIBOR