He's just 'building castles in the air' if he thinks he can open a restaurant without any money.
Millionaires built their 'castles' along the lake.
(..) Jane, all I'm asking is a chance for us to be friends. Because you're the one I want by my side... ...when I'm storming the Elvish Castle of Ganakinesh. You can plunder my dungeon anytime. I'll bring my long bow. TEAM: Warriors! Yeah! Come on. (..)2009 17 Again
(..) DEAN: I'm a single dad. It's totally normal for sons to feel weird when their moms date. I mean, he's stepping into Dad's shoes, protecting the castle. - He's not my son, but... - Oh. Then that's weird. - It is. DEAN: Yeah. (..)2009 17 Again