500442 Listing like craiglist but more modern attractive unique

Hello i want to create a site like craiglist but this site will only focus few main listing such as sex liting, jobs, apartment, service listing and many more. We will disucs that part in future I want this site to be colourful and attractive so use light and bright colours. Also i want it to have regional location such as one in world, North america, europe, asia, africa etc. Inside american for example it can ontain all states in america also inside europe could contain germany containing all states in germany and many more. I want the site to be able to accept adveertisment. Also the site should have payment system like paypal etc and people should be able to post and do the listening themselves. I also want people to be able to refer friends and be able to login in with social network site like twitter etc. I will add more to the site but i tell you more in future. The cheapest price will get the deal and i want work to start on the asap but i will pay from june to july. This is because i want to see the best deal so the lowest offer win.