- Added on: January 26th, 2012
Well if you fly into Singapore and go north, you'll miss out on Indonesia completely. With only four months though, maybe Indonesia and the other island countries may be better as a different trip?
10-12k for 6 months is pretty realistic. I tried to budget 1k a month, but I spent 8 in my first 6 months, and have ~6-7 left for my last 6 months. Honestly, I could have gotten away with much less if I wasn't drinking so much.
It's different on different coasts. Malaysia and Thailand both have opposite coasts that could have very different weather when you're there.
With four months, you won't be able to see everything, but you can plan a pretty damn good trip. So I'd figure out your timeline, then Google average weather during those times of year, and plot a course northwards.
Personally, if I did it again, I'd spend less time in Vietnam and more in Cambodia and Laos. I loved Vietnam's smaller cities and towns and motorbiking between them. The larger cities and tourist destinations were just like unappealing versions of things I had seen in other SEA cities. Plus, if you time your trip right, you'll probably have had enough beach time in Thailand and Malaysia that you won't feel the need to trudge up Vietnam's coast.
You could take the train from Singapore all the way through Malaysia and all the way up to Bangkok easily, stopping whenever it strikes your fancy (you'll have to book separate tickets of course). Very affordable, especially in Malaysia, sometimes cheaper than the bus, and much more comfortable. From Bangkok you could run over to Cambodia (since your 15-day visa is liable to be close to up by then if you crossed from Malaysia), pass on into south Laos, up to north Laos, and back into Thailand for the northern areas. I didn't go to China, but you may have to cross back into Laos or fly after that, but Chiang Mai has a pretty functional airport. Or you could skip north Thailand (my heart would break a little, I'll admit) and give north Vietnam a try.
I will warn you, the sleeper bus between Vietnam (Hanoi) and Laos (Vientiane) is hands-down the worst bus I've ridden on, and I'm including public/chicken buses on small Indonesian islands in that evaluation. The rudest and most insane (possibly drugged out) drivers, loudloudloud music the entire time, and an overflowing toilet. It was a 24-hour trip that our driver did in 18, which would sound like a positive if he didn't accomplish it by driving like a maniac.
If you're going to be taking sleeper buses a lot, you may want to invest in some Valium (or whatever the non-brand name of it is, certain countries like Laos are more likely to give it to you if you say the chemical name), dramamine, or sleeping pills. It's baffling how SEA buses play music/music videos non-stop at deafening levels. Ear plugs and headphones just don't cut it.