No, I haven't been working in the last ten years. For seven years I have been mostly traveling and drifting, mostly in SE Asia. Long story.
You need way, way less money then you think you do but the expectations adjustment process on the mental level is very slow. But of course it is good to have some savings.
In case anyone is curious, I've been able to live well on about $6000-8000 a year. I certainly eat like a king, since fruits and vegetables are amazingly cheap here. Otherwise my hobbies are inexpensive, e.g. exercise and sports, writing software for personal projects, making digital art, etc.
It's not for everyone, but I would have really struggled on a more conventional path. It's been my experience that working for someone else is really degrading, although I'm sure some companies are better than others.
I consider myself extremely lucky, as most of my neighbors here lead very difficult lives. In the poorer half of the world, life is extremely brutal and arduous for most people. It's very sad and I've seen things here that are shocking and appalling (and I am not faint of heart, after spending many years "hustling" in the US). The behavior of other expats here also leaves something to be desired, although at least it's not as bad as Thailand...
Are you worried the cost of living will increase over time and price you out? Singapore and Korea were once cheaper too though I suppose most countries aren't on that trajectory.
Fortunately now I'm able to make enough as a freelancer that I'll be able to increase my income if necessary, but that's almost entirely due to having a lot of time to spend on learning web and software development while I've been here so far.
Cambodia is developing rapidly, but somehow I doubt that the kleptocratic government here will manage to turn this place into the next Singapore or Korea :)
You need way, way less money then you think you do but the expectations adjustment process on the mental level is very slow. But of course it is good to have some savings.