If you are going integrated, there are only a few schools open to you anyway, which are:
FTE in Spain
OATS in UK
Cabair in UK
Visit each one, and after their entry tests, you can then choose. I doubt 50K will be enough to cover it all.
Bear in mind too that the market is turning. Even for us experienced Jet pilots, the UK market is very saturated, and many in my airline who are looking to move are finding that their wings are feeling a bit 'clipped'.
Although I detest CTC for what they have done to the job market in the UK, by flooding it with young guys & gals who work for nothing for 6 months - which is why my fellow colleagues are finding it hard to move on - I think they should be included in your list.