Some of these modern "All in one" boxes can fit in a right small place
I have a Kenwood TS-2000, it fits in my half-bath quite nicely Both Kenwood and Yesau make "Remote" models as well, if I'd gotten the remote model I could have mounted the radio in the basement and all I'd need at the operating position would be a control head.. Basically the front 2 or so inches of the radio, and a speaker.