These stats are so badly distorted.
Seacom prices only reach R1500/mbit when you buy in 100mbit + quantities.
Sat3 prices in similar volumes are in the region of R3000/mbit. Which while more, is prone to actually staying online. Something seacom is having a lot of trouble with.
Yet again, R1500/mbit is only for the international transit, the local back haul + IPC are gonna set you back around R4000/mbit on top of it at least.
Also, everyone forgets about the cost of routers, switches, racks, colo space, flow management, staff, support, software/hardware licensingm and all that which will increase the cost further.
By all mean, buy 100mbit of Seacom to your house(R225k/month). Spend the R200k/month to backhaul it from the landing point to your house, another R500k for the routing kit, another R150k to train yourself to use said kit. (There are other costs excluded for simplicity sake).