Game Devolopment

Hello, I am an indie dev and I do small to medium sized 3d games, I have an i7 7700k and I can really notice how much it slows me down when compiling and building lighting and such, what CPU would be a worthwhile upgrade for me to use now in UE4 and then UE5 once that is in a more stable state...

It's in the back of my MOBO from MSI and since my wireless isn't working, I'm switching to wired. Can someone give me a good cheap Ethernet cable (With a good speed) and an Ethernet hub (since there isn't any Ethernet port in the basement), all with the total price of 20 or under? Thank you.