What are your long term objectives for this property? What do you think you might do with it? Choosing appropriately sized acreage can be difficult. You might say to yourself 5-6 acres will do, but then decide you want to build an arena and you can not because you do not have the land base to do it. An extra acre or so can give you the flexibility to consider expansions down the road. Also, keep the cost of future plans in mind when determining your budget.