I need some advice for leg lengthening. Thank you :)

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Hello guys this is my first post so try not to scrutinize me so much haha.
I'm 18 years old, male and I live in London, I'm no longer in education I work full time in Personal Training in which I have a Diploma in.
I'm 160CM tall and haven't grown since I was 14, I'm taller than my mother and the same height as my father although he claims to have been 170CM tall when he was younger. (lol)
I understand that a male can grow all the way up until 21 which is why this is just a discussion and I'm planning to get the treatment a little further on in life.

I've had several appointments with hospitals and my local GP and all of them are not willing or have nothing that they can do for me.
I was quoted £52,000 by the Guichet Nail and that's without removal...
I'm willing to get a loan or save up for a couple years to pay for the treatment.
I am extremely motivated and willing to pursue this, through all the pain and money.

My questions for you guys are:
Will the treatment effect my long term training goals; one day I wish to compete as a competitive bodybuilder/men's physique.
Will the treatment effect my strength in the long term and does it restrict movements such as deadlifts/squats?
My goal is at least 167CM (+7cm)
I would like to do this through an internal device not an external.
How much would it cost me and is my goal achievable?

Thank you guys so much for taking the time to read my post.

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Thank you for taking the time to read and reply to my post.
Everything is so vague and there is many different answers out there I guess the only way to find out is to try it yourself but it's one expensive and painful way to find out haha.

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bump