If you regularly drive through either salt water (even slightly brackish river water!) or mud, you can expect brake problems, whether drum or disc, but more with drums.
For a comparision on maintenance, my County (disc front, drum rear) has, at 640,000km, had the front calipers serviced once, two sets of pads, original rotors, never needed machining. Rear drums have had three sets of shoes, one pair of new drums, and two pairs of wheel cylinders. Adjustment is checked at the 10k service, but usually only need to be adjusted every second service.
				
			 
			
		 
			
				
			
				
			
			
				John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
			
			
		 
	
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