[Captain Kwok]

Why don't you just make some changes to your site to reduce overall bandwidth usage and in theory server usage so you don't waste your money:

i.e. Make most links point directly to the home page rather than through the intro screen, which is rather bulky at 175Kb. That means every 6 visitors are wasting a meg of bandwidth, so 600 visitors ~ 100Mb and I'm sure you have probably a couple thousand visits a month. You may also want to host only the current version in full, and drop the 1.9.0.0 versions. There's probably a lot of wasted downloads by people downloading the wrong versions - more waste than what is saved by people patching 1.9 to 1.9.1.2!