In Pretoria I would only consider living in a security estate, Oscar lived in Silver Lakes which is one on the east side of town. All of these estates have walls, electric fences and armed security guards with access controls that require a remote or one time code etc.. Most houses inside of the security estates have very little if any security measures such as alarms etc. because the crime inside is generally petty low. These estates are very similar to US HOA's with architectural standards, many have pools, common ares, golf courses etc.. The levies (monthly fees) are usually between $58 and $174 a month. Taxes seem to run about $100 a month for a $260k house and in Pretoria that can get you a 400 square meter house on a nice sized lot with premium finishes and a pool.
The Cape Town area seems to have higher taxes and what appears to be some community security that seems to even out to the same as what you would pay for a similar house (price-wise) in a security estate in Pretoria. The difference is that it appears that you can have enough coverage with cameras and beams in the parts I've been looking at, though many choose to have the electric fences for good measure and there are some security estates as well.
Ignoring the obvious massive disparity you are glossing over here I have perhaps a less antagonistic question.
Do you have to spend a lot on security? Some of these houses look like compounds with wire fences and huge gates etc.
I’m remember the coverage of the Pistorious trial showing all that etc.