I'm going to say more than I should, perhaps.
But this is a way into something a bit more interesting, IMHO.
Step 1 : Get into excellent physical condition.
Step 2 : Learn Portuguese, Spanish, French, and German.
Step 3 : Train with various weapons, especially cheap and common stuff. Get an AK-47, Makarov 9mm, and an old 30-06 rifle, and become proficient in all of them.
Step 4 : Take survival training courses.
Step 5 : Study African geography and politics heavily.
Step 6 : Save about $10k, and take care of all of your home business now, in case you don't come back.
Step 7 : Take no weapons, don't carry much money, but have it available to you, and go to Cape Town. Look up ex-Sandline and Executive Outcomes personnel, many of which have settled there. If you are acceptable (the standards are actually pretty low), you can make decent money. If you are excellent, you can earn $10k+/monthly pretty easy. Just remember, the day to day quality of life is going to be really horrible, you're going to see a lot of death, decay, suffering and agony, and it will be surprisingly boring most of the time, with flashes of intense chaos once in a while. You will have to surrender your morals at the door, because you will be instructed to do things which cannot be accounted for in any rational civilized mindset. And you may die at any moment.