So I have a one-off gig playing bass with a friend this weekend. It's the first time in literally a decade that I've had an outdoor bass gig that wasn't backlined. I sold my "big" rig - a medium-sized stack that shook bars and was BARELY enough for small outdoor venues - last year since it was sitting for nine full years. Most of my bass gigs recently have been either jazz or musical theatre - both of which are handled by my powered FRFR cab. Unfortunately, my cab won't handle a rock band outside, even for stage monitoring. Anyway, my friend is restructuring his band after this gig, likely with me on guitar, so I'm not sure when I'll next need a bass rig worthy of stage monitoring. I've put some feelers out with local friends to see if I can borrow something, but if that falls through, is it terribly bad form to buy something used from Guitar Center and then turn around and return it after the gig? I'll also be looking to see how much it might be to rent something (assuming that any of the local music stores even do that anymore), but the pay doesn't really justify the rental cost. Other brilliant ideas also considered.