I don't see why people act so high and might. At the opposite extreme, would the guys date a homeless lady who lives on the streets?
I think its fair to say that Sarah seems rather mature for age, especially having a 4-year-old kid already and perhaps realises that money IS quite important in life, and spending £150,000 on promoting a music career (what Christian says he'd do with the prizemoney) isn't the most wise investment.