27 UK, answers needed. Help!

[BaldStatement]

Hello, i must lurk this place once every 6 months hoping for that magical news.
However i have buckled, i've decided that i want to go for surgery.
A little about myself:
27
Hair loss started at 17
Have been using Kirkland Minoxidil for about 6 years
I am at 5 on the Norwood scale (i think)

I have some questions:
From what you know; would i still be eligable for Histogen if/when it does become available if i have had a transplant?

I am required to wear a cap at work, how long would i have to wait after surgery to wear one again?

I am looking into going for one of these packages where you go to Hungary to have it done.
Is this a good idea?
Anyone have any legit reviews/threads they could link me to?
I'm looking at this in particular:
http://www.hairpalace.co.uk

tLDR
would Histogen be ok to have for those who have already had a transplant?

Is going to Hungary for a transplant a good idea like what this company is offering http://www.hairpalace.co.uk

thanks!