The Contract between you and the photography agency, the duration of the shooting, the number of employees in the crew, the size of the agency, and even the time of the year (if it is a busy pre-Christmas time) will affect the overall process. Premier photography agencies in Europe work https://www.saludcapital.gov.co/sitios/VigilanciaSaludPublica/Lists/Contactenos/DispForm.aspx?ID=756292