Some other good LL doctors include Dr Becker in Germany who is around 45k-50k and Dr Assayag in Baltimore who's price I dont know exactly. If your looking for the max possible length for the least amount of money I would recommend Dr Becker as his Betz bone device can lengthen a max of 12cm for only around 45k-50k. But if you are intent on staying in the US and not spending an exorbitant amount of money at the Paley institute, a more affordable option would definitely be Dr Assayag. I dont know his price exactly but I think its in the ball park of around 70k-90k.
Dr. Becker is more around 60k in € so like $65k