A Desktop computer with at
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A Desktop computer with at least an I5 Processor, a 2 GB Graphics card and two Monitors (these last two items work together, you need the Graphics card to have ports that work with your 2 Monitors. A Surround Sound Audio card is good also.
Now for an Operating System, I would recommend Linux Mint Serena for an Operating System, it is free. It has a very good Video Editing Program, called KDenlive, which is free. Audacity is free Audio editing Program.
I run Linux Mint Serena and I do love it, as long as you can get Internet in that part of Africa, you should be good to go.