You will have a big problem navigating the salary cap with those guys.
Gasol is a max player. So pencil him in for $22M/yr. Half the league will line up to give him that money and the Knicks will be at the front of that line.
Bradley already has a contract averaging $8M/yr. Smith makes $14M/yr. Together those guys make up 1/3 of a team's cap. Now you're at 2/3 of the cap with 3 guys. Add Rondo's max deal and you're at the cap before you factor in Green, our team option young guys and Turner/Wallace. None of the money makes sense.
Even if you pay Detroit to swap us Wallace/Turner/Zeller for Smith (with at least one pick from us) we don't have enough for a max deal afterwards, let alone Gasol AND Gay.
We'd have ~$13M in cap space to work with (including Rondo's cap hold). If we can sign Gasol for $13M then we'd have nothing left to sign Gay. There is no way Gasol signs for $13M. If Green declined his player option we'd have enough to sign Gasol to the maximum but then Gay would have to take the minimum to play here. Unlikely. At that point we'd need to sign Rondo which would push our salary to around $78M if we max him out. $80M if Gay takes the minimum.
If you give up on Gay (and you should) and just keep Green on his $9.2M player option then the money is a little easier to manage and you only need 1.5 miracles (Gasol at $13M and DET taking Wallace+picks for Smith) to happen.
True, good points. You're much better on the financial aspects than I am! I think Smith would become rejuvenated just by getting out of that Detroit mess and playing back in position, along with Rondo. Would a lineup of Gasol, Sullinger, Green, Bradley and Rondo be feasible though? Other than Gasol, we'd really need another legit go-to-scorer. Aside from that, I hope Sullinger can make great strides this season.