Good morning Helen,
I think the entire concept with South African place name categorization has to be 'keep it simple' and this was very much the wish of the SA Root Project. My first proposals were, lets say, a touch too difficult to implement, with project managers in mind. I hasten to add that some may still be confused with what has been implemented, others believe there is over-categorisation. They may be right, so the scope for drilling down to smaller locations with categorization would be resisted. So, for the Dutch Cape, we limited the smallest area to administrative districts, and from the British Cape Colony thereon to settlements, villages and towns, within Provinces. I think the answer to your query may be to place the detail of the farm name or small place in the data fields provided for life events and then just categorize the profile to the town in which the district usually follows the town name. Some of my profiles have on farm deaths i.e. Doornpan, Schweizer-Reneke and the farm next door Doornbult, Wolmaransstad. My unwritten rule for Southern Africa is on farm life events are categorised to the town which the district follows by name. Hope that makes sense.