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.
(..) or sit on the king's council. Or he might raise castles like Brandon the Builder. - Can I be lord of a holdfast? You will marry a high lord and rule his castle. And your sons shall be knights and princes and lords. - Hmm? - No. That's not me. (..)2011 TvShow: Game of Thrones Title: Cripples, Bastards, and Broken Things Season: 1 Episode 4