Best way to make a gutter offset for placed PDFs?

I'm designing a print project that is going to be almost entirely placed PDFs that are the same size as the final product, but there needs to be an offset for the gutter (no bleeed to worry about). Ideally I would like to just click to select a full-page box and place the PDF correctly in one go, with the offset in place. The PDFs almost never need to be nudged around; most of them just get placed directly on the page, full-sized.

It's a pretty large publication, so I need a more efficient way of doing this... To this point, I've been placing the PDFs on the page, using a key command to align them to the outside edge, then nudged them X amount for the offset.

Surely there's a better way??