Will give you essentially a 2.5Gb pipe between all devices for Ethernet traffic. At the entrypoint of the COAX to your house, place a MOCA filter on the incoming coax line, and this will ensure your network traffic does not leave the house over coax lines:
If you have coaxial cable already in the house, use MoCA (Multimedia over Coax) adapters.
Something like these:
https://www.amazon.com/goCoax-Adapter-Ethernet-Bandwidth-existing/dp/B09RB1QYR9/
Will give you essentially a 2.5Gb pipe between all devices for Ethernet traffic. At the entrypoint of the COAX to your house, place a MOCA filter on the incoming coax line, and this will ensure your network traffic does not leave the house over coax lines:
https://www.amazon.com/Filter-MoCA-Cable-coaxial-networks/dp/B00KO5KHSQ