I find myself over and over again performing an operation that you could call a "rectangular hull", that is I want to draw a rectangle around some objects while keeping a minimum distance from the objects.

The way I'm currently doing it is shown in the attached video. I basically draw lines of a certain length (the minimum distance) from the outermost objects, then I draw perpendicular guides from the tips of those lines and eventually I draw the rectangle from the corners formed by those guides.

I wonder if there is a faster way, because it involves quite a few steps and I'm doing this rather often.

Any ideas?