Thank you! It seems to be, but I'm learning more about uhaul boxes every hour

Big plans for this one.
WHAT DO I NEED TO KNOW BEFORE CUTTING. I don't intend to go into the ceiling, maxfan will be side mounted up high in a corner. But I do need to go into the floor (biggest hole being 3 in or so) and I need to go into the front underneath the attic for the gaping hole for my passthrough. Plywood/fiberglass and aluminum should both cut with a standard 12amp circular saw and a drill with a 3 in hole bit? Do I need more power than battery tools or can I get away with them? Do I just go in there measure and cut? I'm finding myself to be a perfect advertisement for why people would need a book called "uhaul camper conversions for dummies."
Thanks guys.