Um we have 40 acres :-ooo .........but none of it had any functional fences when we bought it, gradually doing that as we can afford to. Only managed about 10 acres so far but have done it properly. Also some of the land is taken up by a scheduled Bronze age site, some is boggy, some buildings, a track etc. and it is exposed wildy Scottish stuff. Basically it's a wildlife haven with some light touch smallholding going on within it :-)))
Have 17 adult sheep (15 ewes and 2 wethers plus 21 lambs ( of which 5 are are reserved by buyers and 6 for sale in the autumn, 5 wethers for meat for us and friends and 5 ewe lambs to retain). 4 geese and 7 goslings (goslings going to new homes this weekend), 2 horses, 2 dogs, 4 chickens and 2 stable cats.
It probably is too much land but the way I see it, it provides peace and habitat for the hares and skylarks and pipits and the like, of which we have loads, which isn't such a bad thing.