5 cm is a good amount of lengthening by means of safety. Your overall treatment will take much less time and you will experience less problems with your leg muscles with 5 cm. You will probably not experience so called "ballerina foot syndrome" (temporary inability to press your heels to the ground and walking on toes. This is treatable with proper physiotherapy and exercises).
We are a team of doctors who successfully perform LL surgery in Istanbul, Turkey. We do Precice, LON, Holyfix and Ilizarov methods so you can choose the method you want from this wide array. Our prices are also within your budget, so you can both have the surgery and still have enough money to stay in Istanbul in comfortable and safe environment. Your doctor or his assistant will be able to visit you frequently and keep your process in control.
To learn more about our doctors, surgery methods, prices and services:
https://wannabetaller.com/our-services/For free and unlimited patient consultation, you can contact us via WhatsApp: +994506844785