Try for a sense of rising action and suspense as well as scenes where the relationship builds. A. I usually get my ideas for crimes from the news. Readers must continue on to find out. I believe the setting of a good book is like another character. I try hard to make it a part of the plot, not just by describing it, but by going there and figuring out how it might motivate people.
Vineyards go back generations.
Now you have the crush of new money where dot-com guys appear, plunk down millions and get into a business that is almost an art. A. Time is always a factor. I add it to hike up the suspense. No One, the inheritance would change IF one or both of the twins die before the will goes through probate. This also gives a motive.