We like to have a new Joomla website including following function:

1, Social community
2, Jobs listing: example www.monster.com
3, Auction marketplace
4, Dating: example www.dating.com
5, RealEstate: rent/buy house
6, Multi-languages

Candidates need to provide answer for following question ( will reject if quote without the answer)
Q: What extensions you will use to meet above functions ?

Please quote price and time if interested.