[bobrooney]

Now I am looking for a second box to place in our basement. We have the Wifi Router in the basement (although, not in the same room) and I want to watch TV when I am on the treadmill there. I want a box which is working the best as possible with Wifi for <50$/55$.

The only thing I use is Kodi to stream movies or series at max at 720p.

For that price I would suggest you Beelink Mini MX (you can go with cheaper 1gb/8gb version since you will use that box only for streaming)
OR
Nexbox A95X (S905 version. The problem is that this version is really hard to find these days)