Have you thought about a mixture of both? And depending on where your located, hour building in the UK doesn't have to be that expensive. I currently pay £110 a month and £60 per hour wet on a brand new ish 172 based at Barton.
I found when I finished my PPL out in Florida there seemed to be a lot of nothing around. I was told which airfields I could do and what I couldn't and that was slightly restrictive. In the UK I fly where I want - i've just come back from flying to Reus for a few days and I regularly gain experience flying in France - the bonus being I fly straight through the SE of England and over Stapleford en route
Horgy