The problem with ants. Have you tried using boric acid? It will kill the birds if they eat it, so you need to put a border of it away from where they are. Ants won't cross it and the ones that do die shortly there after. You could also add some diatomaceous earth to that border. Throw hot peppers, black peppers, garlic, neem oil, vanilla, cinnamon and marigolds into the blender. It won't even hurt the birds unless they gorge on it. Don't sprinkle it make a trail/border with it. If you think your birds will eat it leave out the boric acid. PS Boric acid doesn't work when wet....
Not much you can do about the mold unless a space heater or dehumidifier would work. You are in the south thou so its like opening the windows with the AC on blast. If your coop is enclosed it will drop the level of humidity to an acceptable level for your birds.
Forget the fogger and start a couple small ponds (Fishtanks and kiddie pools work fine). If you can't fight them, join them comes to mind. Instead of attacking them outright, DIRECT
them to an area then attack. You want to attract them to a specific water source, you can put dunks in the water, add Bti (Bacillus thuringiensis israelensis) or even put barley straw in the water. I use only barley in my outdoor fish (snail) tanks and have no mosquito problems. What you don't need are bug zappers, CO2 machines or the like. They don't kill enough and only attact more to your property. If the ground is truely soaked you can just shread barley and toss it everywhere, doesn't hurt the birds. Also plant marigolds around the edges of your property and wherever you don't want them. Marigolds repel alot of insects.
Have you thought about putting some bat boxes on your property? Bats are awesome for insect control and make great fertilizer for the garden. Make a tea from it or put it in your compost pile. Like chicken poop, it'll burn plants when raw.
Hope this helps ya out,
Love the Bubba