@Vky,
One of the biggest risks I know of, is that most of the times, the owners of the properties run to court and is granted an injuction pending a full hearing. Challenge that comes in is that the selling financil institution hesitates to refund the deposit and you are thus caught in between. Tis worse if it is a loan and you have drawn the deposit. If not, then you savings is held up. Take into account how long our Court cases take.
Secondly, you have not stated where you are buying the land. If it is those kienyeji split plots, you may buy one in the middle and your neighbours become hostile, deciding that you cannot pass through their plots. Ita bidii unune helicopta to access your land.
Third, in some areas, you cannot buy land as an 'outsider'. You will never access your 'land'.
Lastly, please ensure tis not ancestral and/or Matremional land.A 'Somebody' will come up with a receipt/Deposit Slip stating that they made a deposit towards the purchase of the land
All said, if you are gutsy, go ahead.