The estimated budget for this project can be determined by considering the scope of work and the materials required. The project involves roof repairs on eight buildings, including the removal and replacement of existing roofing membranes and the repair of substrate. The estimated cost of materials and labor for this project is between $1,000,000 and $2,000,000, as disclosed in the Veterans Affairs Acquisition Regulations (VAAR). This estimate is based on the assumption that the contractor will need to purchase materials, such as roofing membranes, substrate repair materials, and safety equipment, and hire labor to complete the repairs. The contractor will also need to consider the cost of equipment, such as cranes and lifts, to access the roofs and perform the repairs. The factors that may influence the likely payment range include the complexity of the repairs, the type and quality of materials used, and the labor costs. Additionally, the contractor may need to consider the cost of complying with all applicable codes, local ordinances, and VA regulations, as well as the cost of providing a two-year warranty for the repairs. Therefore, the estimated budget for this project is between $1,000,000 and $2,000,000.