Ok. Thanks.
You are on the right track:
If you are only addressing the LAN cable, then add a quality LAN cable (within your budget) between your ground level router and laptop.
There are other, and likely better solutions, but you haven’t asked.... so, my response is focused on your Opening Post and question.
Let us know if you note any upsides.
You are on the right track:
Wouldn’t it be more logical to add it to the 2nd router in my listening room which converts the wifi signal to a wired ethernet connection?
If you are only addressing the LAN cable, then add a quality LAN cable (within your budget) between your ground level router and laptop.
There are other, and likely better solutions, but you haven’t asked.... so, my response is focused on your Opening Post and question.
Let us know if you note any upsides.