As regards the £18k earnings, I'm sure I read before that this only applies to Immigrants wishing to brings non-EU spouses into the country. I didn't think it applied to UK citizens themselves.

I currently fall short of that earnings. With the fact she could possibly walk straight into a job, what if I obtained a letter from them saying that they would give her a job on her return, and therefore showing our combined income would take us well over that?