We had a two week holiday to France 14 years ago. The chap who kindly offered to look after the place lost the keys to the coop padlocks on the first day and had to cut them all off. Because the runs hadn't been moved the grass was scraped bare, the weeds had taken over the veg plot and it took weeks to sort everything out. That was our last holiday. We certainly can't go away in Summer because the watering is endless and includes the chicken enclosures, but really it's all too much work full time.
Having given it some thought, if we went away (post Covid) May would be the best time. Everything will have been planted and it won't be too hot, so not much watering. Only 5 chicken coops now, down from 10, so easily managed. We have a fantastic display of orchids on our land at that time and the views are lovely, so anyone looking after the place won't be disappointed. Now we have a machine to cope with long grass (post to come) they won't have to cut the lawns either.