Don't go cheap on training. Safety is paramount. If you want to fly in the uk, train in the uk. You have crap weather, congested airspace, controlled airspace everywhere, which is brilliant for experience, improving airmanship, and teaching you to cope in a difficult environment. This all makes you a better pilot in my opinion especially if you want to fly in the uk.
So many guys who come back from a 3 week jaunt in the US don't have the experience to cope with these conditions. Where I live in the south east, the airspace is so crowded, I am glad that i trained over here. Especially if you want to go professional.