I will jump in, but I am sure Randy will chime in.

> Internet --- wireless isp ---their radio (I have NO control over nor
> access really)
> --- my router --- LAN

This is basically the setup, even when the medium is a wire via DSL or a cable
modem. But we need to be more specific. After the "wireless ISP" you have a
modem of some sort, which is something that speaks the language of the radio
communication. This box can also have the LAN network integrated, which is
what Andrew eluded to when he said that the whole box can go dead when the
ISP link goes dead. In Randy's case (and in my case), there is a second
router in series with that box; in Randy's case it is the Ubiquiti (in my
case it is a D-Link wired/wireless router, similar). The WAN port of the second
router goes into the LAN of the integrated modem+router box. In this way,
anything that happens to the modem+router will just look like a dead WAN
link to the second router. The benefit is that you will not lose your LAN
should that happen.

It is so simple, it is not even worthy of discussion, which is why you did not
find explicit instructions on this online. Most people just plug all LAN
devices (or wireless) to the modem+router that the ISP provided. You did too...

Randy took the extra step to make the link from the ISP to the second router
be a passthrough, as if the WAN of the second router is directly connected
to that ISP. You may not care to do that. I did not.

Looks like that managed $30 Cisco router will work fine as your second
router. I'd recommend that you spend the extra $20, get the Ubiquiti, read
that PDF that Randy sent (I glanced through it), and ask Randy any questions.