Hey there chap
I went to ASTAC at Shoreham airport (there are two schools one international other domestic ATC) I was self funded, took the Ab initio + Tower, now I only have OJT (on job training) left so I can get my licence.
If you have british passport (I don't) it might be much easier to get OJT in the UK and a job as well.
ASTAC is a great organization with some really nice people there (Shoreham college) if you are interested I can give you the number of the director in Shoreham so you would be up to date. Talk with them, tell them what you want so they will figure it out for you.
Accomodation in Shoreham is also quite reasonable, 100 quid /week in a host family with all 3 meals included.
I always wanted to follow my dream in becoming an ATC, ASTAC helped me out. Now what's left for me is the licence (OJT) and then search a job. I have my fingers crossed!
Good luck and if you have any question don't hesitate to ask!