LOOKING FOR *THIS* BOOK

Hello everyone, i've been looking for a book for quite sometime, sorry, english isn't my first language.

This book is part of a series, and one of those books is about a young woman who's got a debt or something like that and some relative or friend suggest that she writes down on paper what she's looking for in a man, she writes down the amount she has to pay and forgets about it.

later of course she finds that kind of man annnnd she passes down that idk knowledge (?, to her friends so they can find their perfect man.

It is ridiculous but it was a fun story and silly and i reaaaally want to read it again.

if you know what book is pleeeeease tell me