As far as I can remember.. downpayment is 10%-20% of the selling
price.. depending on how much CPF you have..
CPF will only lend you up to the valuation price of the unit.. any
extra you would have to top up.. alternatively, you could get a
bank home loan
Grant - First time homebuyers are entitled to a 30k grant, staying
near parents (either 2km i think or same estate) would add another
10k grant... note though that this is not eligible for couples
whose combined monthly salary is above 8k and you would have to
return this grant if you sell and buy another hdb flat.
Couples with combined monthly income of 8k are not allowed to buy
new hdb flats, however, they are allowed to buy hdb flats from the
resale market (or condo lor)
I guess the best is to ask HDB directly..their website got a
enquiry line as well as an email address.