@coolkevin isn't that wrong.
only hosting the stuff that's posted here on akiba is a huge amount - not to say the traffic etc.
under the 100k you shouldn't really think about starting s.th. like this.
on top of this, you have to deal with DCMA-Requestes, complains of users, etc.
so you need to provide them access or act within hours (the last time i checked, they request the deletion in a max of 4hours) - so you need a 24/7 stuff - which is also expensive.
and then a big problem: how to you gain money, to be able to buy the servers? Prem. Acc? PPD? PPS?
that's not as easy as it sounds - loads of hosters have started and are down within the first few month of business, since megaupload was shut down.
If you want it just for your own uploads, with a max of 1TB etc. it's not a big deal and can probably be done within a few hours and around 150$ per Month.
But a public service is s.th. completely different