Nail Removal..Exspensive?

Ive been reading over your answers to split nail issues. my 1 year old dane just recovered from having a peice of paw pad "sliced" off. now she has split a nail on her other front paw.Which is surprising to me because i trim her nails regularly, unlike my other dane (2 years) who will not let me near his and he has never had a nail issue. Ive cut off the bottom part of the nail. Ive been cleaning it daily with the blue vet antibacterial soap and apply anti-fungal cream, keeping it covered when she is outside. She is a very active dog and continues to be her normal bouncy self. I do have some clavamox at my disposal. should I start her on them to prevent infection. Is there anything topical I can use to make the nail grow back faster, and I do prefer treating my dogs at home, but if I were going to get it removed or the other options, besides the $70 appointment, how much is this going to cost me?