Footprint Scaling

I want to increase the size of a unit, which i know how to do changing max and min scale in the model.

But I also want to change the footprint of the unit so that it takes up the amount of pathing space that the bigger size shows.

Ex: Like say making a supply depot, 2x2, take up a 5x5 space like a nexus.

I’ve messed with the footprint, and nothing works except giving the unit the footprint of another object.
But it still doesn’t work in the way i like. I would like to edit the scale and boundaries of its footprint.