[Spaceships] Hydroponics and food vats

[Agemegos]

The existing rules in Spaceships offer four ways to supply food, water, and oxygen, and remove carbon dioxide and other wastes.

1. You can supply each person 4lb of food per day from stores, which are presumably carried as cargo. Water and air are recycled by equipment included in the habitat modules; any supplies it needs are presumably included in the food allowance. 1 compartment of steerage cargo will contain 5 tons, enough for 2,500 person-days.
2. At TL9 or above you can equip habitat systems with total life support, which halves passenger capacity but provides food. That implies that the food-producing system for a person masses 1.25 tons if the person is in a bunkroom. 2.5 tons if they are sharing a stateroom, 5 tons if they have an unshared stateroom, or ten tons if they occupy a luxury suite.
3. An open space system dedicated to gardening or hydroponics will supply food and oxygen to an entire ship or habitat. That can work out to as little as 1/8 of a ton of garden per person.
4. At TL12^ a factory or minifac (replicator) can explicitly create oxygen and food by atomic transmutation. I would have thought the rules implied that a TL11 nanofactory could do so given waste for its raw materials. By the rules for consumables a person's food for the day is $2, and a nanofactory minifac produces $10,000 per hour, so a single nanofactory minifac can feed 120,000 people. (The replicator is far less efficient: a replicator minifac produces 0.05 lb/hr, which is 1.2 pounds per day, enough to feed 0.6 of a person.)

I'm inclined to find none of those rules quite satisfactory. So I'm thinking of combing ballpark figures out of the page on life support at Nyrath's indispensable Atomic Rockets website, and then

• Specifying a mass for consumables that excludes water (as water is recycled) but includes oxygen.
• Specifying new Factory systems (and thus, implicitly, minfacs) specialised for the production of food and oxygen. Hydroponics at TL7, algae vats at TL8, vascularised tissue cultures at TL9, etc.

Naturally, I would prefer not to duplicate effort if someone else has already done this. Is anything of the sort available?

Does anyone have any helpful advice or suggestions to offer or make?