I transported pots for 2 years. If something was going to break, it was a handle. Every time. But like everyone has said, it can be done. Just carefully. I used hairspray on newly glazed pieces to help prevent chipping.
If you go ahead with the wiring and amp upgrade, don't have your kiln sitting there. Just simply tell the electrician and the inspector that you need a 6&50 plug (or whatever you need). I had my kiln sitting there, so the inspector made me direct wire the kiln. Although, the rules vary from state to state, so it might not be an issue for you. I live in Colorado.