We're looking for investors with 'pockets' that are deep enough to pay for the project. [=investors with enough money to pay for the project]
People 'vote their pocketbooks'. [=people vote according to how a candidate or issue will affect their financial situation]
It turned out that they had 'pocketed' [='stolen'] most of the money that was supposed to go to victims of the fire.
(..) Fast as you can, H.W. Are you ready to do this? That's it, ladies and gentlemen! Al Rose has very generously provided some refreshments for this occasion out of his own pocket. Thank you, Al. If you'll all just care to help yourselves, I'll be back in a minute. Mary. Mary Sunday. (..)2007 There Will Be Blood