In the two coasters I sailed in, everyone aboard had their own cabins and the crew cabins were about the same as the officers, except that the captains had their own bathrooms. But the chief engineers only had cabins like the rest of us, without even a wash basin. Everyone (except me) had to pay for their food as well, but as I worked for a radio company and not the shipping company, the shipping company had to supply my food.
What coaster were you one? Mine were Frederick T Everard, and the flatiron Wandsworth. Here is the famous painting of the Wandsworth in the Science Museum, London: **LINK**
In Pembroke Coast, there were two separate galleys for crew and officers, I have never come across that before. But as they had to pay for their food, I expect they would have ensured the cook provided them with good grub! On the Wandsworth the two mates did four hours on, four hours off watches, because the captain didn't seem inclined to keep a watch, but the chief engineer did the 8 – 12, so the three of them did 4 on, 8 off.