Contact Brian@BBGmarine for a price ... I bought my Garmin 93sv & Livescope from him & he's a good dude & has great prices & service.
Installation is pretty straight forward & instructions come with the LS. I elected to mount the LS tdx on the shaft of my trolling motor. The power wires to the LS black box are ~6ft long, so you'll have to run it to a separate battery or buy wiring to run it back to your transom or console. The LS system does pull a lot of power (~5amps/hr) which is why many opt to run it to a separate battery. The tdx cable is very long so it would have to be coiled up and taped if you mount it on the trolling motor.
I just got mine and have only had it out on one trip, so not everything is "installed" just yet. I already had a Hook 7 unit up front, so I elected to buy a Cumberland Crappie Fishfinder Mount to put my Garmin 93sv on, so it would be above/behind the Hook 7. I intend to run maps or DI/maps on the Hook, & Livescope only on the Garmin. (I did not purchase the transducer for the Garmin 93sv on that account). I purchased a 68ah AGM battery for the Garmin unit & Livescope box.