A great set. Challenging to put it lightly. I went through the pain of collecting this set a few cards at a time, it took a couple years (maybe three) in VG/EX condition. It was costly. If I had to do it over, I'd probably adopt Larry's 10% book rule, and sacrifice a bit on condition for the high numbers. In hindsight, it would have been wiser to wait until '72 high number collection came up at an auction house. There was a EX near set recently sold at LOTG that was reasonable.
Good luck and happy collecting