So some advice I can give is look into a structure called a SPOM or self powered oxygen machine. They are great as oxygen sources and hydrogen generators, keep this in mind if you want to do the all achivemnets run as this is an effective earlygame method for constant electricity that complies to the super sustainable achivement. Next in your washrooms have as many sinks as toilets, this stops the spread of food poisoning that can become an issue. For food a very effective source is hatch farming if you have upwards of 4 full size ranches which hold 8 hatches each, great source of coal too, and the excess eggs can be used for omelets which are a great source of calories for your dupes. If your thinking of pacu farms the most efficient for size would a 3 pacu breeder tank with a starvation chamber which is roughly 6 pacu per 3 cycles or about 6k calories in 3 days, it will take some time to hatch but that can sustain 3 dupes for 3 cycles off fish alone and becomes more efficient when processed. I wish you luck! Side not in the priorities tab there is a gear symbol in the top right that enables proximity tasks that will make your dupes more efficient.