My advice, have a look on the forum here, there are quite a few threads asking a similar question to what you are.
Basically, its a 50/50 equal split. Make sure that you can cover the other person's portion in the event that something goes wrong/they default/become unemployed or any other event.
Try save up a little more to cover transfer costs and bond registration. The price region you looking in is mostly exempt from transfer costs, but there will still be attorneys fees and bond registration fees. Save up for that.
You may also need to save anywhere from 5% to 30% of the purchase price for a deposit, depending on the lending institution, your credit / risk profiles as well as the property profile.
I'd suggest approach the banks & SA Home Loans directly. I've had bad experiences with bond originators and then went on to have better luck with the banks themselves.
Renting out the property comes with it's own set of potential headaches but also it's fixed costs. Make sure you know these and can afford them before purchasing the property.
Good luck!