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.
(..) Yeah. I know this one. It's a commercial! For coffee, right? I shall leave thee now. I am expected by the king at the castle. I'm taking the minstrels there. Let's go. I'm a brave and good knight. Wow, that's creepy... It's about naked people... (..)2011 Intouchables