Buying property in Sandton

I’m considering buying property in Sandton area for investment. I have narrowed down to 3 options which are standalone townhouses in Broadacres and Bryanston. 2 sectional title (Bryanston and Broadacres) and 1 full title (Broadacres) Prices are almost the same and I will be buying in cash.

Which one do you think would be a good investment in terms of rental collection, area, demand and property value appreciation. And what things should I consider as a first time property buyer.

I have attached pictures and prices.

Thank you,