Some random thoughts...
I don't know much about 'fat from your arse' implants, but normal ones only have a lifespan of 10-15 years iirc. That means that, if you have implants aged 35, you are signing on for a lifetime of repeat surgery.
I also wonder what the women with implants will look like at 75, when everything else has aged and there are two implant 'rocks' in the middle of their chest.
On the financial front, if you are a single mum then, unless you are very well off, I imagine that money could go to something more positive for you and the kids? And if you were thinking of a loan, won't that be a financial strain?
Do also remember that your perception of naked breasts is madly skewed by what society shows you - which is largely pornified implants. Normal ones don't look like that.
Finally, if you meet a new man, the first time he sees your naked boobs (assuming you play it right), he will be anticipating having sex with you for the first time. I can almost guarantee that what is going through his mind that point is 'way-hay, we're about to have sex' (or some varient of that) and not 'ooh, those boobs don't look like the ones in magazines'.
Oh, sorry, one more thing. I don't know if your DC is a boy or a girl, but 'what message do I want to send my daughter' puts a lot of questions in perspective for me.