My dad use to raise/train hunting beagles in the 70's. We had over 100 with all the pups. But we were far out in the country, had nice long (well cared for 6 ft wide by 20 ft) runs with big 6 ft wide by 5 ft deep houses on the back. He had a waiting list for buyers. Dogs were worked/trained daily so they got plenty of out of run time.
I don't think I'd ever own another beagle but they were sure cute!