https://httpswww.thegpsstore.com/Gar...YaAnj7EALw_wcB

Thegpsstore.com has a garmin echomap chirp 93sv with transducer for $600. This would leave money to get a ram mount under it, and raise it even more. I did similar to this with a 73sv plus unit. Its high enough i barely have to bend over to touch it.
If you look at the features these units come with, i think you'll be tempted. Look around, you might find better deals.