The Alphahole's Guide to Marrying Your Enemy: Fake Relationship Romcom

My best friend's little sister is an infuriating, cantankerous, pretentious do-gooder who thinks me making a billion before I hit 30 means I'm a filthy, unethical robber baron—and she lets me know it every time she sees me.
The fact that she's a sexy little minx notwithstanding, I wouldn't date her if she was the last woman on Earth. As a matter of fact, I've repeatedly fantasized about shipping her to Mars.
But first, I need to get my mother to sell me her pigeon-plagued abandoned warehouse ...