Mixer wagon is certainly not ruled out. The great thing about bales was anyone could put out a dozen bales and the cows would get the right amount of silage. There are three of us who feed now and I think/know that the amount they are given daily by counting grab fulls is quite variable. I quite like the idea of someone with weigh cells.
We're probably going to go for a 24 Cube reconditioned keenan to feed around 500 cows and followers. Never thought something like this would be the answer but the realiti is running around with blocks etc takes a lot of time.