My recond is SIX, my 72, 129, and a 70 that Dad bought new in 1965, and I stored a full trailer & truck load for Wyatt for several months, plus his 169, '73, and I think it was a 72 that later became his Plow Special.
Those were the " Good Ole Day's of Cubbing", Wyatt would come out, we'd work on projects, He'd help me mow.
My shop was 24x36 to accommodate 3 Cubbies, my F-250 long box, my Super H & loader and a couple power tools like a table saw, drill press, and a mobile work bench. I guess I should have made it 30x48 or bigger, I didn't anticipate ALL of SON'S wood working shop tools to get stashed in it too.