Exactly... talk to everyone, find out what the costs will be for various options, and put a plan together.
I'm as high as anyone on Jansen, but I don't understand how anyone could be opposed to signing Grandal. He's averaged 5 fWAR per season over the last five years. Even if you don't believe in pitch-framing or something, he's still been a consistent 4 fWAR player. He's an elite defensive catcher and a switch-hitter with a 118 career wRC+ and no platoon split (114 from the left side, 119 from the right).
That's a star player, and there's no QO. If he's open to a reasonable deal, you sign him, plug him into the middle of the lineup, and figure out the rest.