Hyper farming

Today I calculated that I over a billion food items I can use under the resource tab. I obtained all these items during the casino bonanza a couple months ago. With that being said, I am wondering if I should destroy my farms producing food in my main stronghold and build a different type of resource producing tile such as ore, stone, or wood. My upkeep will eventually outgrow my farms anyway once I mass produce tier 4 troops. However, at the moment I'm keeping up with the food needs of my troops. If I destroy my farms I can just click use and receive food from resource tab or take from farms. My stronghold 21 can produce some incredible resources if I hero skill it properly and maxed all tiles to 21.