How much extra do you think a NSW Cup would cost? If done right you could streamline the whole thing. You risk having holes in development otherwise
I see the lack of NYC as why the QLD teams struggled last year. Infact the whole standard dropped across the board
So no issue having some games as curtain raisers.
Almost all the grand finalists of the last decade were affiliated with lower tier clubs instead of running their own reserves at the time they made the grand final. So so much for risking a hole in development lol.
Also in most other major competitions around the world the players that don't make the first grade team play for another club, and nobody would claim that any of those sports struggle with development, in fact most would say that their development is better than ours.
So in other words the whole 'we need it for development' is a nice bit of propaganda, but that's all that it is.
As to how much it'd cost, well that depends on a lot of things that we don't really know because V'landys and the NRL haven't been clear on what they are actually planning. But however much it costs it's still be a hell of a lot more expensive than splitting those costs with an affiliate club, and it's worse for the game because it further reduces opportunity and restricts growth outside of NRL.
If you want to get a good idea of what the lower tiers could and should be, then look up The Battered Bastards of Baseball and Sunderland 'Til I Die. They're both great documentaries on Netflix that are well worth a watch, and will give you a good idea of some of what can be achieved with lower tier competitions if you put the effort in.