I also do the same for rural polyclinics and medical facilities land area as 0x0b.
That I find easy for remembering by colours instead of trying to remember what the various colours refer to.

The only issue that will arise for all this consolidation is should we need in the future to have a detail breakdown - then it will need sorting out now, but can still be resolved by using the same colour only different polygon no asignment. That you can see now used in the default rivers and lakes polygons.
My 2 cts worth.