Check out the following YouTubers:
Explorist life (victron ambassador);
https://youtu.be/sEW-ZaOOlq0. Mostly does 24 volt builds, but discusses 48volt systems in a few vids.
DIY Solar Power with Will Prowse;
https://youtu.be/YcKO4ZhjJlk. Mostly does 48 volt stationary systems, but has multiple RV vids.
5toGo;
https://youtu.be/phkPgNh7xJM. There’s a good three part series about an epic 48volt system.
The JayYo Nation;
https://youtu.be/dvCDksDwP-Y. Good 48 volt build.
Enjoy the vids and good luck with your install! Please keep us posted with your progress.