Hello and welcome to the forum from Wales!
My big top 3 would have to be.....
(1) A few good farm buildings available for storage with a hay barn or shed to put feed in for animals (not forgetting suitable buildings for housing in case weather is really bad).
(2) Somewhere which is quite breezy in the summer, to prevent too much fly strike, but not so you get gale force winds.
(3) and lastly but certainly not least..... good grazing with decent fencing and preferably land which doesn't need too much doing to it. ( this also includes a large garden for chickens and the like).