members area with a difference for a mobile disco

Hi,

I am looking for something but not exactly sure what i should be looking for, confused? then try stepping into my brain.

here goes.

I assume this awesome CMS can do this.

I am a mobile DJ, i am wanting to create seperate members areas, for clients that booked my services. they log into the site via a link given, not from the front page. this takes them to thier own section of the site. where they can see their contract, receipts etc and also have the ability to upload playlists, images, videos messages etc. I suppose its a proper client area. If this needs to be a seperate site thats not a problem as i could always use. https://members.my.com

I just have no idea where to start with this, and hope some of you wordpress wizards can assist me.

many thanks in advance

Gary