If you're doing the repairs out on near your hives, you're going to have go with either hand, battery or propane powered as I don't see you dragging hundreds of feet of air hose out to the hives.
Are you taking the frames back to the garage/shop to repair? Then something air powered would work just fine. Porter Cable is excellent quality, but if it's just something that gets used on occasion, then the Harbor Freight would do.