Anyone nomading from Singapore?

Hey all, anyone nomading from Singapore and have any tips? I'm freezing my ass off in Japan and want to spend the winter in a sunny place . Thailand is the obvious choice but I prefer somewhere with low pollution. I love Singapore and don't get bored there, but the accomodation is the big stickler. My budget is about 4000 usd, any good serviced apartments or monthly rentals you'd recommend that would be possible? What's important to me: peace and quiet (don't want to hear my neighbors), breathable air like a no smoking building and a decent kitchen to cook healthy food in. Thanks for any info!