I'll bite. I just ferment for 25 so not my set up. Just tossing out some ideas.
Start with a used food grade ibc tote. Free to $100 on CL or cruise around a business park. It will have a 2" valve at the bottom and hold 275 gallons. It will easily fit 300# of feed. Once it's fermented, the feed will settle on the bottom and you should be able to just open the valve and pour off the solids into 5 gallon buckets. It will be a boatload of buckets. If it's too soupy, put some dry feed in the feed pans and dump the soup on top. If you want to feed it more firm, you would need a minimum of 10 5 gallon buckets with holes drilled in them. Drill holes in the top of the tote and let them drain back into it.
I wouldn't worry about multiple totes, just keep dumping fresh feed on top. The solution will be so potent, your feed will ferment quickly.