Which sink estate would that be in?
You're not going to get anything but a grimy inner city location for that in the UK.
Rubbish, you don't know what you're talking about.
My last address in London was 10 minutes from Waterloo by train... and not on a "sink estate" either - but you have to know where to look. Inner city, yes, I'll give you that. But I don't do "country bumpkin villages" anyway, and never will.
I no longer live in London, but nice (but small) houses in my area cost £400-£450 a month. Ex-council houses, rather surprisingly, may cost more - but that's because they tend to be much larger.
This is a bit extreme calculation though... everyone spend some money on clothes, for fun etc... but your calculation also don't include such expanses
True, which is why I did mention
disposable income ;)
You have yet not considered that there are many other reasons than money to move to another country: love, family, friends, experience a new atmosphere, learning, adventure, travel, etc.
Actually I have, but that wasn't my point. What you say is true, though.