LoneGunman, at this stage it may look attractive, but if you use it for yourself only, you will need a lot of time to pay off the upfront cost (20K vs. <1K for ADSL), something like 1-2 years. In 1-2 years time I bet there will be some better options in SA (what an optimist I am!), like 100GB ADSL for R800 all inclusive, which will make the satellite look much more expensive option. So if you share it, and you pay it off for 6 months or so, probably it is worthwhile, but if you need 1-2 years to pay off the upfront cost (in the form of saving compared to local prices of what you need), then it is a bit of overkill.
Besides that remember the high latency and the bad weather problems.
As far as I know you can get the ISP for <150 euro per month for 512 kbps unlimited, but I guess there are cheaper options as well ...