My Doomsday Territory

On doomsday, Tang Yu unexpectedly got the Lord of the End System, he remained very calm.
Lack of experts? I will construct a pub so I can make ten draws in a row;
Lack of food? I can’t be too cheap with the large pack full of food supplies sent from the market;
Lack of safety? Arrow Tower, Mage Tower Artillery and all kinds of automatic defence buildings. Having many isn’t too many;
Lack of equipment? Workshop production must produce high-quality items. Sir, would you like one? We are having a 20% discount special at nine!
…………
In short, this is a story of Great Lord Tang building up his territory, attacking some monsters, and ripping off…… Cough, making some money at the same time.