Just my opinion as a Kenyan
posrche has recently opened up an official showroom and service centre in partnership with a local company and seem to be doing well. However, 99.9% of the porsches out there are either cayennes or macans and it's definitely more a case of brand ownership/showmanship than practicality out there.
There are a few other models out there but majority are classic 911s heavily modified for rally use. Panameras are now being advertised and there's one or two on the road but again I don't think it's been thought through.
The roads are, relative to UK, utter crap and will cause major issues for a sports car like yours. It's just not worth it. Factor in the traffic and unless you're using it at 2am on the main highway which isn't that long anyway, there's really no place or time you'll be able to enjoy it.
You will generate attention but more curiousity and not people trying to shoot up your vehicle. That being said you'll probably get tired of people touching and running their hands across your car (if you are particular about your paint and damage then You'll hate this almost immediately as there's no concept of private property for cars) and there's a probably chance you may find bits of bodywork missing or mirrors snapped off (or as I've experienced once, some **** trying to hurl $h 1 te through the window if you don't give them money)
And this all waits for you after, as someone accurately posted above, the hassle and cost of getting your car into the country. It won't come in under the radar so I'm sure customs will give you the full experience. Ask me how I know....
That being said, if you really want a Porsche pick up a cayenne or macan there but again due to tax the vehicles can cost up to twice the amount when comparing it to here. Especially now with the exchange rate!!
Otherwise, as other posters have said, get the best land cruiser money can buy and explore the country. So much to see and do and that car will get you there.
Sorry for the long post but hope it helps. Ps ignore the pic above no ones going to shoot at you. And you don't need a bulletproof car (unless you have reason to hide behind it or are a public servant embezzling or using tax payer funds)