The usual rules apply. Building management services include cleaning, maintenance, seasonable HVAC (heating and air conditioning) changes, snow ploughing and grass cutting, etc. What would the value proposition you'd offer be? What segment(s) would you target and why? What would allow you to grow profitably? (As a business of this type, investors will be very difficult to get large loans or any investors, so growing your revenues and going profitable quickly will be important. Come up with your startup strategy, and document it. please describe in details with proper defination.