Neighborhood defined. Property shall be considered in theneighborhoodof property owned and used by the organization in the performance of its exempt purpose if the acquired property is contiguous with the exempt purpose property or would be contiguous with such property except for the interposition of a road, street, railroad, stream, or similar property. If the acquired property is not contiguous with exempt function property, it may still be in theneighborhoodof such property, but only if it is within 1 mile of such property and the facts and circumstances of the particular situation make the acquisition of contiguous property unreasonable. Some of the criteria to consider in determining this question include the availability of land and the intended future use of the land. For example, a university attempts to purchase land contiguous to its present campus but cannot do so because the owners either refuse to sell or ask unreasonable prices. The nearest land of sufficient size and utility is a block away from the campus. The university purchases such land. Under these circumstances, the contiguity requirement is unreasonable and the land purchased would be consideredneighborhood land.