my ds use to sleep crawl in his cot. full pelt into the end of the cot. bang his head, cry a bit, then take off down the other end and repeat until I picked him up. It only took about 3 weeks for him to stop. I dont think a toddler bed would be your answer, just that she would end up on the floor or other random places.

do you have a sleeping bag you could put her in so to limit her limb movement?