The cost to taxpayers is not the capital, it's the interest on the capital.
At max 26 Billion investment at any given time the MAX interest would be 1.3 Billion pa.
"I am on ADSL1 at 1.2 mbps and run 2 businesses with live auctions etc quite easily."
Does your "live" auction include video in real time? What happens to speeds when the bloke next door opens his real live shopping site? Then someone else opens the site that projects your image (in real time) onto all the clothes in the shop to save you hassle of getting dressed and undressed 20 times in a day just to see what looks good on? We are at the begining, not the end.
