How To Buy Resales Hdb Flat With Existing Hdb

I would like to purchase resales Executive flat whereby currently I had 5 room flat.

1) Should I go to HDB loan or Bank loan? What is disadvantage of bank loan?

2) Should I sell my house first or buy my house first?

3) What is the cost ( est hidden cost if any) for buy and sell a flat?

( example agent told me Valuation cost $1000 ~ and not higher then $4000)

but hdb website show $199.25, is there other cost I didn't know)

4) Is there any adv cash for buying house? Agent told me 5% adv to bank if using bank loan. anymore adv cash I didn't know?

Edited May 9, 201511 yr by tailgatepro