If you're considering Sydney then AWS Lightsail (their consumer VPS offering) gives you 512MB RAM, 20GB SSD, and 0.5TB transfer for US$3.50, or double that for US$5.
I run six production websites on the smaller size instance, which is Nginx, PHP, and MySQL. Yes it all runs on 512MB RAM, I have swap available but only a little of it is used. 1GB would be better, I just wanted to see if I could do it. I use 1% CPU most of the time, spiking to about 20% for short periods for backups. You'd want the larger size for a busier site as it has more CPU. I also use CloudFlare free plan for CDN. My uptime is good, in AWS Oregon, I've never had any unexpected downtime. With EC2 I pay more than what Lightsail charges, but I had it before Lightsail was announced.
While AWS isn't particualrly simple to use, LightSail has been made to be simple, with it's only easy to use control panel.