Graybeard
You make an interesting point. However, the great unknown is how many ex-airline 767 / DC-10 / MD-11s are actually available - and the mod state / engine choice / corrosion blah blah - and trying to buy 179 similar aircraft is likely to nothing but increase the price of those second hand jets.
So in principle a good idea, but for all the reasons outlined, I think that it is probably a non-starter.
S41