I don't think the exact amount of money matters - but being self-sufficient and having a good financial IQ is essential. Someone needs to be able to survive by themselves before I feel like I'll be able to have a healthy relationship with them - kind of a catch 22, but it's the truth.
It's similar to how I wouldn't want to date someone smoking cigarettes - because the health risks are huge, I don't want to sign up for that!! But I also think that love is a tricky thing, these aren't hard and fast rules so much as idealistic ideas...