FNG to Polaris

Been going through threads as a guest. Looking into buying a 1k High Lifter as I live in Florida and have lots of water covered land. First Polaris atv, and have been reading up on things to look for, or out for.
Front diff cover. Don’t know how difficult install is, completely capable on doing it, but can I get the dealership to install it or no sale on my part, maybe? On their dime….
Frame braces. Unsure on this one. Don’t jump much, but will try to climb anything and everything in and out of the water.

Thanks for any info.