Have you been before bearing in mind that a month long holiday is totally different from the gritty reality of spending a prolonged period of time there,as you said its just a dream but these sort of things can turn into nightmares.Four hundred quid a month at the moment is around 30 thousand pesos?Could you live on that?What about your health as you get older?Always think of the realities mate,your money,your life,your call,no one else can decide for you,the choice is always yours