They wouldn't be replicating it because the current situation is way off ideal:
1) The singers are miles from the roof so their noise doesn't sound loud
2) The songs can't spead right because the away fans are right next door
3) The songs are drowned out by adjecent away fans so don't spread
4) There are two seperate groups of singers who can't hear each other.
It's all about the way songs spread organically around a stadium having started in one place. Whatever the mix in the current safe standing areas, they are the most voal supporters and they'd have to be encouraged to move to the new stand first. They would make or break this. Only 1000 initially would be enough. Build it (and make it work) and they will come. There are thousands of thousands of would-be singers in our stadium who would sing if they had a leader and others did.
It's not about setting up a "singing section" as you keep saying. It shoudl be about concentrating the noisiest fans in one place so it spreads.
I was referring to the cheaper season tickets. You'd end up with the same mixture in the North stand as you've got in the South stand if that happened. There would be a pile on for cheaper season tickets in the North stand.
The stand won't be ready for another 3 years, so if season tickets continue to rise season upon season that will be at least another 2 season ticket price rises before the North stand season tickets are available to buy. So trying to gauge a price for season tickets now is pretty impossible.
Other factors such as tier 2 season ticket availability, Platinum, Gold, Silver, singing section season tickets, age season tickets, match day tickets, etc, all have to be factored in by the club.
The new North stand, roof and acoustics will look after themselves.