Using Coax for LAN

[Davo456gt]

Cat5e or 6 ethernet cable as far as you can (or fibre), and buy some decent gigabit switches and hence some Unifi Access Points off them.
Far better than any home standard wifi setup in terms of speed and coverage.

For switches I've used Netgear GS110TP (can take fibre too - which may be a bit more future proof for you) and then Ubiquiti Unifi AP-AC Pro - Radio access points - brilliant stuff

my other bit of advice, if don't just 1 cable in, put 2 in and if one breaks...
or you can use Link Aggregation and run at twice the bandwidth

[VEX]

Ethernet over coax are also called Moca Boxes and we have used a few as get out of jail solutions in the past.

They work really well and don't interfere with standard UHF/freeveiw tv reception.

They are even powerful enough to pass backwards across Tv amplifiers as well.

V.