I would really check this out locally, for example if a croft is tennented they are not allowed to sub let. A lot of folk ( especially up here ) wont have a horse on their land at all as they only have sheep netting which horses ruin. Any good grazing they are rearing meat on, making what hay they can on etc. A lot of crofters consider horses as a waste of good grass. Best to buy if you can if you want horses later on. Check out trekking centres or riding schools if there are any on Skye as some centres do livery for the use of horses in the school. Dont hope and guess and say there is a lot of land, a lot cannot be grazed at all in some months and the rest is sheep hill with associated grant conditions etc. A couple moved up here thinking it would be simple and they would be doing some crofter a favour by renting land off them. It ended up in a tragedy, they could not find anywhere safe for them, one was shot the other given away! Dont mean to be a misery , I came here with two horses but own my land, I am just saying how it is up here to give you some idea as to what you may be letting yourself in for. Good luck with your move!