@Happy Wanderer:
You are of course right, that list is just what I'd like to collect eventually so as to have every option available. All that kit will most likely never be used in a single game.
For example, in the largest scenarios in the Bush Wars FoF supplement each side has about 25 to 40 infantry figures and about 3 - 6 vehicles. Considering that the PBI was highly mechanized on both sides in the Border War that feels about right.
Given common table sizes I think for larger mechanized and/or armored formations 15mm is the wrong scale. But as always that is a matter of taste.