I have no idea if such facilities exist. But every large dairy that I have seen (I've seen many as a part of a former job) have sand beds for the cows to rest on and have plenty of space. They aren't fed any drugs. Never any drug to make them calm. The floor surface is designed for cow comfort, rinsed every 10 minutes, or regularly scraped. Cows are bred at 2 years old, so start milking at 3 years of age. So, no one is culling at 3,4 or 5 years old. It is in the dairy's best interest to keep the cows healthy and in milk for many years.
I cannot imagine what is meant by death tankers. Dairy uses a lot of manure and liquids. Sometimes it is pumped to fields, sometimes it is pumped into tankers and hauled to fields. The fields may be owned by the dairy or the dairy may contract with other farmers to take the slurry. Michigan has a Right to Farm law and it protects farmers from lawsuits, only when they follow safe, standard farming practices. That includes plowing down all spread manure.
Dairies have always required employees. But like every other employer today, they have to compete with the government pulling millions out of the potential work force, by welfare. Milking cows is a messy job that requires quite a bit of labor. Often hard to find workers that will work such hours, weekends, even on Holidays.
It is illegal to hire workers that are here illegally. I know of at least one dairy farmer that went to prison for employing illegal immigrants. That seems unfair when I hear about the thousands of Tyson employees that are here illegally. Seems like another two tier justice system to me.
Sometimes I think about the dairy where \my Uncle Hank worked. I loved to visit there. But he had no vacations. They had to leave early from family Thanksgiving or Christmas dinners. They had to maintain a big garden and butcher their own pigs and render the lard. Not for the nostalgia. The did it to keep from starving on the meager wages farmers made.
Yes, the cows were well cared for. But if you could see the thousands of dairy cows in a large modern facility, you'd see they are well cared for, too. Just not in the same way as 70 years ago. But back then, farm workers accepted that there would be long hours, hard physical labor and little pay. Farm communities thrived when 88% of the population toiled in agriculture. Today, it is 3% that work to produce all your food. So, labor saving methods are required.
All it would have taken was a single crop failure, a broken leg, a lengthy illness and the family would have been out on the road with no money and no where to go.
Don't just long for the day, build a 40 cow dairy and set the example of what you remember. The reality will crush you.