This answer addresses an issue which is peripheral to the main question BUT utterly crucial.
For interplanetary (let alone interstellar) food transportto be viable you are going to need space transportation technologies not only far beyond what we have now but also far beyond what we imagine will ever be possible.
I could dig up numerical figures for the following but it makes the point adequately without them. I may add some if there is enough interest shown.
At present we use chemical based propulsion systems.
A Saturn V delivered about 4% of its launch mass to orbit.
An utterly inconceivably good chemical rocket systm is unlikely to be deliver better than 10% launch mass to LEO.
To deliver payload to the surface of Mars from LEO requires as much energy per kg from LEO as it takes to get TO LEO.
So using the Inconceivable V launcher technology ("IV")we can deliver 10% x 10% = 1% of launch mass to the surface of Mars.
Using Saturn V technology it's 4% x 4% = 0.16% of launch mass or 1/625th of launch mass.
Delivery to near earth asteroids is about 0.5% using the IV and Lunar surface is somewhere in between asteroids and moon.
A Space Elevator reduces the earth's surface to LEO energy cost to about zero. (Energy per kg to orbit on an elevator is a few MJ at 100% efficiency . Allowing for substantial inefficiencies that's say roughly $1 in electricity costs.
But, even if we get off the planet's surface for free, we still have to get to the destination and to re-enter the payload. Antimatter systems will bring the cost down and the payload fraction up - once we manage to get antimatter down to commodity pricing. As antimatter is currently priced at about 2500 trillion dollars per gram (2.5 x 10^12) we, or your posited civilisation, have some way to go from our present situation. That 1 gram costs about 100,000 times as much per kWh as current electricity prices, which is actually quite encouraging. But unlikely to be commodified any time soon.
SO - unless we have a new Non-Existium V drive technology it is likely that almost any practical alternative is going to be cheaper. Orbital growing systems, underground systems, float in the air, ... .
The only way to make this sensibly viable is if you can produce a magic matter transport system that requires minimal energy and delivers payload between planets, or stars, rapidly or instantaneously. In a story this is possible. In our reality, start planning local farm systems.