how to assess the value for the proposed option assuming that you are reporting to the owner

(1) a factory that is proximate , 15 years old recently sold for $1,200,000.it is of internal area 18,00 sq ft , and under 12ft to eaves and the same materials as the subject.

(2) a factory that is proximate of the same , of the same design and materials let 1 year ago for rent of 60,000 per annum. the internal area is 15,000 square feet , the eaves height is 15 feet the same as the subject.

(3) a factory that is 5 years old recently sold for 600,000. it is of internal area 15,000 per square feet , and is 12 feet to eaves . it is let to lease for a 10 year term , with 8 years unexpired for 60,000 per annum.