Is hovering with an airplane easier or harder when the model is larger?
As a general rule, the larger the plane, the easier it is to hover.
However, small 3D foamies don't follow this rule since they are probably the easiest planes to hover of any of them.
Would a Showtime 50 hover pretty easily on a Saito 82?
Would it have enough power? Yes.
Would I consider it to be easy to hover? No.