First you must agitate the don by outsmarting his body guard at the slums, then ask for a job, he'll ask you to retrieve cassie, talk to cassie about the don, then after a few days she'll go missing, approach the don and youll find hes captured her, then you must recruit people around new ark to help save cassie, after you save her, capture a bandit girl, and after you finish the mania following that, you'll be able to renovate the basement. Keep in mind if you dont recruit enough people you and cassie will have to flee new ark and the game will end.