When did I bring up cost? I 'm well aware that adding Royal Orchard would boost the cost. The reason I support Option 3 isn't really about the cost but because I really like the design of Bridge Center, assuming they can integrate the 407 Transitway into it while keeping it fully grade separated (if they can't then this is a dealbreaker as far as I'm concerned, and they should go for Option 1 or 2). As for the depth, can I get a quote for 50m? Its going to be deep, but not that deep I don't think? Ultimately we're dealing only with what Metrolinx is telling us so whether or not building Royal Orchard while digging under the river will be more expensive is... hard to say and nobody except Metrolinx knows for sure. If it is cheaper to rebuild the bridge, then they should rebuild the bridge, and if they're pressured to build a Royal Orchard than it would be a good opportunity to change the plans.
As a side note, dropping Cummer isn't ridiculous. The street is 500m away from the northern entrance of Finch Station, which is well within walking distance. Furthermore if busses like the steeles bus are dropped, that means there will be room for the Cummer Bus to stop at Finch (assuming it doesn't already). Cummer is definitely not the most necessary station (although it definitely would be nice to have, and barring NIMBY nonsense would be more important than Royal Orchard).