well, have seen no pic's of your cat, so really can't comment on before and after. Again I ask, do you love this kitten???? Does it own a special place in your heart???? If the answer is yes, then let it go and count your blessings. Regardless of what it really is, it's a unique cat of unknown heritage. Spotted, high level of character, fun to play with.
$2500 is what I paid fur me first F3, so thinking your investment is not to extravagant. My F2 twins were much, much more, but still a bargain at todays fair market rates.
If your furbaby is healthy, a charmer and a looker, what more does any cat lover need??? Just sayhing!!!!!