They wear sheepskin coats and do well in the cold, except for when baby lambs are born. If you only need about 100 tons of hay, it may be cheaper and easier to buy the hay than to make it. This might also allow you to increase your ewe numbers. You will also need small pieces of equipment for foot trimming, tail docking, ear tagging, and possibly for shearing. Your market is a valuable resource that must be studied and cultivated.
Sheep probably respond more to proper care and attention than any other farm animal.
For the most part, the labor is not hard, but they require quality time and quality labor. Timeliness of sheep management tasks is very important. You must have time to do the jobs when required and not put them off until next week or next month. You must have time to observe the animals and recognize their needs. Finances are individual, so we cannot give much information here.