Automatic waterers?

Im finally getting water n electric up to our barn. I decided while I had the trencher rented I dug a line another 50ft to barnyard/pasture area... looking for best options for an Automatic Waterer possibly heated. Im looking for easy install but want reliable to. I'm concerned about it just being one more thing to go wrong... considered just putting just another hydrant in like im installing inside the barn. Look for done opinions. Thanks guys I haven't been around for awhile.

Automatic waterers?