>Can the wireless network(s) be scheduled to turn off at night and then back on in the morning?
This seems almost tin-foil hat level security. Nobody is wardriving at 3am and hacking into your wifi.
>Is it limited to one logon at a time? It should be. The router should not allow multiple computers to logon at the same time using the same userid.
How does this improve security? I guess you can use it to catch an attacker on the rare chance that they get access at the same time you're on the admin page, but that's not really worth considering.
>Can the userid for the web interface be changed? Every router lets you change the password, a few let you also change the userid. This is most important when using Remote Administration. An October 2016 study of 12,000 home routers by ESET found that "admin" was the userid "in most cases."
What's wrong with "admin" with a secure password?