Can My cats fracture on his left elbow heal?

My cat had a fractured like two weeks ago I took him to the vet and they said he had a fracture of the distil humurus. They put him a splinter and a collar cone. He took his splinter and his collar that same day and I didnt take him back because im on a tight budget. My cat is acting normal. He is eating I am worry what if his leg doesnt heal and I cant affford surgery. what is the best thing to do? I dont wanna put him to sleep.