I'm in the US. My kitchen currently has a ceiling fan + light combo that is controlled by a single switch. The switch is at the far end of the kitchen (next to the outside door) and I'd like to add a second switch near the dining room (i.e. replace existing single-pole switch w/ two 3-way switches).
I'm pretty familiar with what that involves, but I'd also like to add another switch near the dining room so that I can control the fan independently (both these would be in the same 2-gang box). So the existing switch that currently controls both would just control the lights, but I could also control both the fan+light from near the dining room.
The ceiling fan/light combo would physically be located between the two sets of switches.
So my plan is to run 12/4 from the existing location to the fan/light ceiling box, with two hots for the 3-way switch and one "always hot" for the fan switch. Then I'd need two cables from the ceiling box, one 12/3 and the other 12/2 (in these I'd use the white wire as the switched line for both).
Does this sound like a reasonable setup? I've included a rough diagram of what I have in mind below.
As a follow-up question, my local home store currently does not have any 12/4 NM but they do have 12/2/2. Can I use that instead as long as I properly mark any white wires which are used as hot?