There are a few people who have ltc adults but no one has been able to spawn and raise up any for sale. The Reptiles article is the only one I know of and their results were few morphed out toadlets which ultimately all perished if I recall the ending.
Firstly dealing with 1,ooo tads is daunting when it comes to keeping them in clean water. I've built centralized filtration systems to raise up red eyes and gliding frogs in those numbers. These are systems like you see with tropical fish. A large wet dry filter or sump supplying a bank of tanks with continually circulating water. Leave the tanks bare bottom because it's easier to syphon out the poop and uneaten food. Use aquatic plants to provide shelter, food, and natural filtration. Duckweed is great but the Agalychnis tads eat them. Also parrots feather Myriophyllum sp. is an easy plant to use.
I would break up the tads into small groups and mix up the food you offer, notice what they eat and don't eat. Remove any uneaten food before it spoils. Keep records on what you observe. Avoid foods with too much yeast, this will create internal gas bubbles and kill the tads.
I always use RO water to raise tads and I dose it with a good amount of blackwater extract, so it resembles iced tea. The tannins in the tea will help keep bacterial counts down. You may want to experiment with small groups in treated tap or other water sources, just to know what works best.
Keep the temp in the mid to lower 70s as a starting point but if possible raise some at a cooler setting, if they are too warm they will morph out too quickly and be small and weak. Longer is better for tads, you will see larger more robust animals.
Lastly if you cannot adequately care for all the tads then get them to others who can help. I'm sure you could get a lot of volunteers on this board, myself included.
Let me know if you have more questions
good luck
ERic