$30/day if you return it to the same location for a 6'x12'. Might be worthwhile since if you borrow one you gotta return it anyways. You get ripped for a one-way if it's not a highly trafficked route. I got a 6'x12' one way from Richmond VA to Manhattan NY for $96 (and you get it for 3 days on a one-way).

Might want to stop in a uHaul place to try some other locations nearby for pickup/drop off that will save you money.