That, for reasons fully set forth in the findings of the Board, the aforesaid circumstances or conditions are such that the strict application of the provisions of this chapter would deprive the applicant of the reasonable use of such land or building and the granting of the variance is necessary for the reasonable use of the land or building, and that the variance as granted by the Board is the minimum variance that will permit reasonable use of the land or building. The needs or desires of a particular owner or tenant or of a particular prospective owner or tenant shall not, either alone or in conjunction with other factors, afford any basis for the granting of a variance. The fact that the improvements already existing at the time of the application are old, obsolete, outmoded or in disrepair or the fact that the property is then unimproved shall not be deemed to make the plight of the property unique or to contribute thereto. Where the Board finds the zoning classification of a particular property to be conducive to the deprivation of the reasonable use of the land or building by the owner thereof, and where the Board deems the same condition to apply generally to other land or buildings in the same neighborhood or district, said Board may call this condition to the attention of the Town Board and may recommend to said Board a general amendment of this chapter;