150 acres of arable land is barely more than a single 'hide' or, if you're post-1066, a 'ploughland'. These are primarily assessed in terms of productivity, but are roughly approximated to about 120 acres. The majority of early medieval peasant farmers, freeman or 'villager'/villein, worked on average a 'virgate' of land, about some 30 acres. 150 acres therefore is only enough to support 5 'villager' households, perhaps about 20 people. If this was your sole holding, it might not even be enough to qualify you as a member of the aristocracy at all; according to Wulfstan of York in 1002/3, owning around 5 hides of land (and thus having around 20 tenant households, or ~100 people), was enough to qualify you as a thegn, and thus qualify as (petty) nobility. Owning a hide would qualify you as a ceorl - a land-owning free peasant comprising around 10-16% of the population by the time of Domesday in 1086.