not really clear what you’re asking for, to be honest.

So it doesn’t matter per se whether it’s a 4g router, other than the fact that a lot of those services won’t give you a publicly routable IP. Is this device a windows or Mac device? You can use things like Chrome remote desktop to completely obviate the need for anything particularly fancy.

If you’ve already doubled checked the coax connections being nice and tight, call your isp. It’s almost certainly a signal level issue or something else on their end.

Run a wire or go with line of sight microwave or whatever the standard is for that nowadays. I think ubiquiti makes a bunch of good stuff for it

Wouldn’t shock me at all.

Always use your own router. Tell the isp to give you a “modem only” or ont, and then use your own device. Give them no access into your network as a best practice.

… Why?

Check your contract as far as what you can do, but if residential is an option why would you be forking our for an enterprise link?

Most servers out there can’t actually give you that much bandwidth. In fact if you don’t have a very specific reason for that plan, I’d downgrade if it’ll save you money.

I’d bet money you have an ethernet link somewhere that’s only negotiating at 100 mbps. That’s nearly always the case when speed tests. Top out in the 90 mbps range.

Do you plan to have a plex server and use transcoding? If so, the i3 is probably the best call. If not, I’d go with the ryzen. And in fairness I’ve heard people saying that and transcodes fine on plex despite not being supported.