Depending on how deep you want to fish, you might want to look at just using lead core vs having to deal with the added complexity of a rigger, weights, releases, etc. A 10 color (a full spool which is 100 yards) will get your spoon or whatever down about 50' and you can run 2 or maybe 3 at the same time depending on your kayak. You could also add some in-line planer boards and get the lines out a ways from the kayak giving you a wider spread. It would be a lot of paddling to keep your kayak at the 2-2.5mph that people typically troll at (not impossible just a lot of constant paddling). Would definitely be sweet in a powered rig or a pedal kayak.
Food for thought.