Hi Gary
I saw your gateway online via the TTN API. Very nice to see South Africans joining too. Earlier I also saw a gateway in Bellville, but it seems to be gone now.
I am from Stellenbosch, but currently work in The Netherlands. Here I am involved with LoRa-based projects and TTN.
Maybe if I'm back in SA in a couple of years' time I will join or start a TTN team in the Cape.
It's going to be difficult to find enough people to join your team to cover such a large area. However, there already exist amateur radio groups with repeaters covering most of the country. Maybe you should look into contacting them and hear if they might like to join. A good starting point is www.sarl.org.za
Regards
JP