Open a convenience store, if you have experience (yes, you can open one with $50000 - $60000 for inventory and fixtures in a rental space).

Work all day - 3 shifts - everyday of the week.  Do not hire Nepalese. They will steal your money and blame you for not paying them enough no matter how bad/sympathetic you feel for them.  Good Luck.  I leanrt this reading several posts here in Sajha.