I made my Livescope portable. If you rig it up to your boat you can safely install the transducer that comes with the Unit. I have the 74 SV and it is plenty big enough for me in my kayak. If I had a boat I would get the 9" screen. I rigged my SI transducer to the kayak permanently but attach the Livescope transducer to the side and am able to rotate freely to see 360 around me.
The unit I bought was from GPS store and the 74SV was $899 and the Livescope was $1499. You can buy the HD transducer which is another $500 but my images are crystal clear so I didn't buy it. I copied this guys video on kayak install. For boat there are many Youtube videos on how to make it portable to use on other boats or a dock.
YouTube