Sorry Clive but my experience of buying parts for Jap 4x4's has not shown them to be any more expensive than LR bits. All service items are roughly the same and items like Radiators and Alternators are probably cheaper if you don't go the main dealer route. The point is though you don't need any parts, expensive or otherwise, these vehicles are inherantly reliable and will happily go to 200k plus miles without needing anything major done.
The Mitsi electrical systems have components, connectors and relays which are almost aircraft standard in quality and Alternators and Starters just carry on working. Likewise the transmission just carries on working, it doesnt leak it's oil on your driveway either.
As for LR's being easier to work on, well I did the timing belt on my 3.0 V6 last year and was amazed at how simple it was, only needed about 3 spanner sizes, the anciliary belt adjusters are simple screwjacks and above all no straining with a giant bar to get the crank pully undone like some engines I could mention. True the plugs are a bit of an elaboration to get to but they are platinum tipped, last for 62K miles and only cost a tenner each.
I note also your advice in another thread on buying a diesel Rangie - if I was confronted with all the pitfalls that you brought up I would run a mile. In fact before I read it I must admit at being tempted into LR ownership again, the beautiful leather and walnut interiors are very beguiling, but not now mate, you've really put me off.
So to sum up, if you want a reliable work horse buy a Shogun, Land Cruiser or Trooper or two Disco's so you always have a spare when the other one is being repaired.