The Pretend Billionaire Groom #1 (Finding The Love Of Your Life Series) by Sierra Rose
This is part 1.
Rose is a veterinarian in Wessler, a small town she calls home. Her father has just passed away. In order to secure her inheritance, she must be married by age twenty-six. And that's when she calls in her crazy, unemployed, and carefree best friend named Tommy.
When Tommy's responsible brother comes into town from New York City to attend the wedding, he learns they're all taking a road trip to Vegas. The clock is ticking… Old friends reunite to get Tommy and Rose to the altar as fast as possible.
But sometimes…things don't go exactly according to plan.