I was looking into something else when I found a seed that almost had this. So looking into the idea more I found these.
Version: 1.16+ (older versions don't have the same house layout)
Recorded on: 1.16.4
3182788383883649913 mesa with mushroom island SW (shown in video)
-8266487768798993543 land ruin and buried treasure
-5092294456432925831 nearby mountain and mushroom island east/south
Found by: mooing_cowmilk