Lesser Ghosts are not tooo pricey anymore. That is what I would use. You have time on your side, I assume you are going to get her to 1500gr or so.

In the mean time get a male Lesser Ghost, Lesser Black Pastel Ghost, or Pastel Lesser Ghost on a payment plan or save up the cash and get him when she is closer to being ready. At least, that is what I would do.

If luck is on your side, you will have a Lesser Ghost Clown in no time.