"I do not see how a party in a valuation case contending for a higher valuation can argue that an error of law is inherent in the determination of a lower valuation because some step in the method of valuation used is not supported by any evidence and is arbitrarily fixed, where the alternate method of valuation also involves some arbitrary judgment or, where the court, as a matter of fact, decides that to be the case or, where on factual considerations, it is open to the court to discard and it does discard that method of valuation as unsatisfactory. … If the answer required to be given cannot be arrived at by reliance on evidence in the sense that is required by the judicial process in other fields, then I do not see how a decision given can be disturbed on an appeal limited to errors of law upon the argument that there was not evidence presumably in the ordinary sense to support each of the steps taken in the method of valuation used. Decision required to be come to is not amenable to the appellate process based on error of law."