5.18. Suppose site acquisition costs typically equal 30% of total development project costs, and 30 years typically elapse between major redevelopment on a given site. By what percent per year does the property value grow less than the growth rate of the location value of the site? 5.18. Suppose site acquisition costs typically equal 30% of total development project costs, and 30 years typically elapse between major redevelopment on a given site. By what percent per year does the property value grow less than the growth rate of the location value of the site