Wah booking.com cheaper than Agoda.com?Tom & Cua u need to avoid. 1k sgd more than enuf for 2 wks, its way cheaper than Bkk. Just diy can lah, flights from sg to viet is cheaper than KL. My suggestion, 1 week in Saigon cafe hopping, fly to Dalat to enjoy cold climate for another week. If you like beaches, take a few days from your Saigon week and add them your Dalat week, 3-4 hrs bus from Dalat to reach beach city of Nha trang, fly from Nha trang back to Spore. Book all hotels via booking.com, cheapest in vietnam. For detailed itinerary & budget, chat with Gemini. Travel up north only Dec onwards. Saigon rain is similar to sg.
I been using Agoda.com after switching from Expedia. I read about booking.com kena hacked years ago. Now just stick with Agoda