Within the travel industry the term 'broker' is used to mean a company that buys or has access to a high volume of accommodation places. These are sold on to tour operators, tour organisers and others.
The term 'flight consolidator' is a company that buys a high volume of flights from one supplier or a high volume of services across many suppliers and then sold on to tour operators, tour organisers and others.
Becoming a broker or flight consolidator requires the network of service providers or a network of tour operators where the broker is buying a large number of services from one supplier and selling them on to tour operators in smaller numbers. It will be an option as a start-up business.