I have a 2017 crestliner vt18 DX with original Hook 7 upfront and a Hook 3x at the console. 24v system. I want to upgrade original equipment trolling motor to a ghost and install a elite ti2 upfront and move the Hook7 to the console.
My questions are…
Will the original Hook work with the ghost and ti2?
Should I trash the original Hook and cough up the $ for another graph?
Is this a lengthy install or pretty easy?

There is no connect ability between TI2 and Hook. The only other unit that connects to a TI2 is another TI2 and its wifi. IF you don't care about networking then use the hook with the transducer in the stern area. The TI2 is not compatible with Live Sonar or Active Target. So, it all depends on what you want to do and when.