adwcta
King
You can do this? What are the limits and costs? You don't know how long I have wanted the ability to move some food around. Agrarian cities fueling industrial powerhouses with pop should be an essential game mechanic of Civ IMO. I'd like to be able to manage pop a bit too (move it around, with limitations of course), but food is basically the same thing, just a bit more mming.
There are no limits (well, distance, but unless you're settling in far places, shouldn't be an issue for your first expansion).
The cost is high. It's more hammers than building a worker, so it'll hurt your ability to build other early game stuff like wonders. The food is free, it's not lost in the capital. Frankly, none of the early trade route bonuses are actually worth the production cost of the caravan. Early caravan would be very situational.