I want to start a niche business that involves a website that generates traffic with a forum, and a space to upload/download documents to share - this is free so I don't know how much security there needs to be here, just for the login data I guess.
It will make money through selling on it too and also with advertising its own recruitment service (and possibly other ads). The market is at its largest around 300,000 people - although obviously I don't expect to have everyone on it - maybe 5% - 10%?
Does anyone know how much this will cost to maintain? I am hearing that it will cost £1m per year but I just can't see how. And that's money I don't have 
Am I being naive about the costs here - are they just simply prohibitive?