I agree with you there frank I farm quite a lot of “free” land and I often wonder if it costs me more than I he £150 acre prime land It’s a balancing act like you say ..We have an inch or two of snow this morning and are lambing outside.
Down here in the south east it is not all milk and honey, our major issue is usually droughts which can last from June to September. The climate here is always quite harsh and normally winters are very cold when the winds blow from the East.
@GUTH is quite right there is a lot of land for very little or no cost in the summer months, however that has to be balanced against the lack of fences or maintenance of the land and City folk who have ideas about "Rewilding or Regenerative" without having a clue what they are talking about.
The Romney sheep which we have always had is very good at recovering from extremes and luckily the lambs are born with wool and a layer of fat. We have improved the genetics partly by using NZ and also high index native Romneys. Lambing & now above 150% and weaning weights around 25% better than ten years ago.
Yes they don't suit everyone but they will survive in the Hills.