It was not long ago that one could be guaranteed a 3 month visa on entry, then another 3 months extension.  More than enough time to complete their 5-month DTS.
Recent immigration reforms by the East African governments now have it that one has to renew their tourist visa monthly.  You will most probably get 1 month on entry.  We cannot guarantee that your visa will be unquestionably extended each of the 4 times you will seek extension.  That uncertainty is why we would say you should proceed to apply, but with extra caution.  In the event that you are not able to stay the entire course of the school (both lecture & outreach) due to an expired visa, your whole DTS will go down the drain.  You will have to start it all over again, whether you return to our Base or go to any other YWAM Base in the other nations. The UofN has recently been categorically clear to us, that the DTS is a single unit, and cannot be split into lecture phase and outreach phase, to be done separately.