What are you aiming to raise them for? If to hand them back at weaning age (around 13 to 16 weeks old) and have plenty of back up and advice available, then it could work. If you want to keep them as pets or for future breeding then you don't have enough land. You'd also need dagging shears, foot shears, wormer gun and drench gun, vaccine, needles and syringes, pour-on, drinker and permanent clean water supply, hurdles, feed buckets, antibiotic spray, feed bottles, iodine, lambing ropes, hay, straw, 18% protein sheep nuts and so on and so on .....