17 The evidence, which the plaintiffs placed before the court, revealed that the plaintiffs are the lessors of a piggery. The lessee, Tact, operates the piggery on the land and pays rental to the plaintiffs. The photographs of the piggery annexed to some of the valuation reports indicate that the piggery is substantial. A number of buildings have been constructed on the land to facilitate its use as a piggery. The evidence also establishes that effluent ponds have been developed on the land, lined with vinyl in order to prevent seepage into the Gnangarra Mound water supply. As I understand the plaintiffs' position, they maintain that there are particular advantages to them in having a piggery conducted on the land because of the geographic proximity of the land to suppliers and facilities necessary for a piggery to be operated. It is said that it would be difficult to find other suitable land in the same location upon which the same operation could be conducted and that to find other suitable land may necessitate moving the piggery to either Boddington or Wandering, many miles from Perth, and away from the advantages that the plaintiffs' land presently enjoys. To shift the stock, plant and equipment and buildings (if that was necessary), or even to construct an equivalent piggery at another location, would involve the plaintiffs in substantial expenditure. Further, the plaintiffs contend that they would lose the benefit of the capital gains exemption that they presently enjoy by reason of the fact that the land was purchased by the plaintiffs before the introduction of Capital Gains Tax. To conduct the piggery elsewhere would involve additional costs in transport and the like for the transport of the pigs to market.