If you have a linux device on the network you could have that be the dhcp server and control lease times there, dhcp and dns on a linux machine(even an old lapt

If you have a linux device on the network you could have that be the dhcp server and control lease times there, dhcp and dns on a linux machine(even an old laptop) are way better than all but the top tier netgear routers. If your windows machine is always on you could even run it in a vm. https://askubuntu.com/questions/248355/can-i-run-a-dhcp-server-on-an-ubuntu-vm-under-vmware-and-serve-the-host https://askubuntu.com/questions/248355/can-i-run-a-dhcp-serv... Hope that helps. You'll still be behind the NAT of the netgear router but you'll have better control over QoS. Here's how you can do it on a debian box https://wiki.debian.org/DHCP_Server https://wiki.debian.org/DHCP_Server