Yes, way more than you obviously. Your figures were a final cost of 100 billion over a budget of 30 billion. (I did make a point of saying it was YOUR estimate). It seems you were a teensy bit wrong!
Jeez, why are you such hard work? No I'm not, but I am possessed with a degree of intelligence. Crossrail overran its budget by just under 15% If HS2 overruns its budget by the same amount it will come in at £34.5 billion (assuming your figure of the £30 billion estimate is accurate). That...
If the budget overrun is the same as Crossrail (about 15%) then no, it'll come in at £34.5 billion. Even if it doubles it'll be nowhere near your scaremonger figure.
Must admit I'm inclined to agree. It's disappointing obviously, but it was a HUGE project with lots of 'known unknowns' and the slippage in terms of times and budget is not an excuse for outrage. (Nor should it be used as an excuse not to embark on other infrastructure projects).