Having worked there for a few years, the flying was great, Guernsey is a nice quite place, but very expensive.
You will get a housing license, this then determines the minimum TRP value you can look at.
This is a system to allow locals to still buy houses below your TRP value.
As a stepping stone to other airlines and opportunities it's good.
As for number of hours, they take guys with as low as a couple of hundred, but you need the ATR type rating first.