A team of 3-5 with coach, agent, massage, physio, dietician (to inform chef) is standard enough. Some of those will be (as others have reasoned) less exclusive/full-time, and more a squad service or via national federation.
If the operations head he mentions is covering a coach and an agent's burden of liaising with federation, race organisers, sponsors, anti-doping and other support, and general scheduling with athlete it may be a larger return than it sounds in that interview.
Chasing changes and refunds from flights and accom. is a lot of stress removed, as is the management of food shopping etc, or redeeming/reimbursing expenses with race organisers, personal sponsors, national fed.
A question is whether the ops person and chef would travelling with him, in which case their fees and full-time status adjust significantly. At majors the national fed. often cover things more.