After inspection (or based on your exterior assessment), get written estimates from 2-3 licensed contractors for each major repair. Common foreclosure repair costs: full kitchen renovation (15,000-50,000 USD), bathroom renovation (5,000-20,000 USD), new roof (8,000-20,000 USD), HVAC replacement (5,000-12,000 USD), plumbing overhaul (3,000-15,000 USD), electrical update to code (3,000-10,000 USD), mold remediation (1,500-15,000 USD), and cosmetic refresh including paint, flooring, and fixtures (5,000-15,000 USD for a whole house). Your maximum offer should be: market value after repairs minus repair costs minus your desired profit or discount margin (at least 10%). If the numbers do not work, walk away.