Got the HB Helix 9 DI on the bow and Helix 9 SI on the console with ram mounts on my new tin rig. They are networked. Got it in my head I wanted to learn structure fishing so I figured this would be necessary to do it right. After a year of it, I realize I don't really care to find structure in 15-30'. I would rather just fish the way I enjoy, beat the banks very early for the top water bite and maybe run cranks, soft plastics or whatever off the bank in 5-15'. I'm usually done by 10:00, just don't enjoy fishing more than four hours.
This being the case does it make any sense to try to swap out these units for basic fish finders? One thing I will be keeping is the MK Terrova. I recorded my path around the small lakes I fish and then just hit replay and I don't have to touch the trolling motor unless I get hung up. This is worth ever penny it cost.
If I were to sell the boat in the future the low end electronics may come back to bite me. One more thing, with the cheaper fish finders, I would not have adjust the ram mounts for fishing and travel position. No big deal, but one more thing not to do before/after launching.