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.
(..) Then let's go to England now... for the girl and the slave. We don't even know where they are. Where else would the slave go but to Aella's castle... to be rewarded for his treachery? Perhaps, but what chance would we have? Aella's castle is the strongest (..)1958 The Vikings
(..) Twenty years passed. Queen Enid had died... but the rumor that she had given birth to a son... continued to plague King Aella. Although his castle became the stronghold of all England... Aella was unable to stop the Viking raids. Now let it be known... throughout the kingdom (..)1958 The Vikings