Why do you need the entire integrated setup to be outdoor-rated? That just adds tons of cost. If the antennas and modem need to be outside for signal strength reasons, so be it, but as much of your networking gear as possible should be indoors.
https://store.ui.com/us/en/category/internet-solutions/colle...
If it’s fine if you want to build a golf cart, just don’t pretend it’s an ATV.
Unless you count hiring someone to do it for you.