Mapping fishfinders

[SkunkBoat]

IMHO
Even assuming you don't fish,

Generally the low end sale items don't have the best maps and even the best maps are no substitute for sonar.
If you only go to the same places then sure, follow your trail and you won't run aground ...unless the sand moved.

If you fish but not often, you can stick with a low end unit without the sidescan.

IMO, get something decent and don't throw away good money on something marginal. Pull the boat and install a new transducer.

Don't buy a sale unit that does not include a transducer because buying a separate xducer later will be stupid expensive.