Well brother i will suggest that Open A Car Rental Business With Few Cars Like Mehran, Civic, Corolla And Make bz these are easy to invest as well as pay back is more gud. & U Can Do Business Of Car Selling also. Go For a Shop in Hot Place in Market And as ur young also so Invole Ur Elders and Go For it With Some Gud Contacts.
u can also buy new model cars and rent it in government section by ur any good links and i kw u will get back real handsome amount per month.
and dont let any1 to take care of ur setup u must be the key and control everything urself no partners.
and there are many other things but this one is for everyday cash business ..