Simeprevir is now increasingly hard to find, but on the good news front there are other options and good 3 drug treatment can be done for about $2000/12 weeks with good options - depending on genotype. So in ballpark terms it now cost 1/2 what it did 12 months ago.
Prices should continue to fall but 3 drugs, and longer durations do mean it will never be quite as cheap as the first go with a good 2 drug combo. Most people go well on the 2DT which is nice, but it's good to know there are stronger things available for the small % that don't get it done first time round.
The notion is that 12 weeks should be sufficient but I can understand people wanting to overtreat a bit.