Just to save $8??? I mean, you have to take it somewhere to be balanced anyway, why not let them mount it too? You're guaranteed that the proper mounting equipment isn't going to gouge up your wheel.
For the record, though, I've had to re-seat a blown bead on my 4x4 with a small compressor. You need to put a ratchet strap around the tire to push the beads out. Then start pumping up.