most food for less coin?

[bitealot]

I an new, i have 3 small, 2 mid and 1 large farm. I dont have alot of coins and still saving for a light dragon so not to much coins to spend. so what is the largest amount of food for the "lest" amount of coins

[buttrluv]

The 30 sec for is the cheapest but you'll have to baby sit your device. 3 min food is second cheapest but there again you'll have to baby sit your device. I think i recall reading the times/food per hour bit it boils down to this for the large farm and small farm. The longer the time the less cost effective the reward. Which is strange for a game of this type but hey. Cheers.