A word on the 'conveyor thing' (aka gutter chain).. If this is an older barn, make sure you check the chain for any weak spots before using it. We had an old dairy barn (a big (over 50 stanchions) one), dad had repaired some of the links but I guess there was one that was still weak, we were running the gutter and the chain caught on something (not sure what) and a link broke. I watched about 30 feet of chain come flying down to barn to land about 5 feet away from me. It was scary!
We were using our barn for milk cows (just a few for home use), and behind the bigger cows we covered the gutter with a piece of metal. Dad ended up turning half of the barn into a garage for his truck, and in there he put gravel in the gutters (we took the gutter chain out of the whole barn). The gravel worked great except for the cats with thought it made a wonderful litter box.
Good luck with your barn!