I tried a similar idea, two rows of  feed panels placed   12 feet apart   from each other  running parallel so it made a rectangle, 40 foot by 12 foot. on each end was two corral panels so I could open it up to fill or open both ends to doze it clean.

then I could stack and tarp a semi load of 3x4 bales in the feeder.eight rows of bales, stacked 5 high

worked perfect the first year, just crawl up on top, cut the strings, and the hay falls off to the sides, and the cows eat.

second year, I was trying to force the cows to  clean up some older hay, when the calves crawled into the feeder, and started tearing into a bale....the smell got the cows excited, and in a day or two, they had a corner ate out, and the stack was leaning...

I cut the tarp straps, and two rows of hay went down.... busted up the feed panel, and popped off two posts!

I did not like the location, so I hope to rebuild it this next summer.  all in all, it was nice, no fuel costs to feed for a few weeks, and when it is empty, just doze it clean, and bring in more hay.