As each job is completely unique with many variable factors, I prefer to quote on an individual basis after discussing and being fully briefed on a proposed project.
Every job has to allow time for site and risk assessments to be completed to make the site as safe as possible for everyone involved or nearby.
Depending upon location, the assessments can be made on the day or well in advance of a project.
If any special permissions are required in order to fly legally, eg. flying close to a restricted airspace or large crowds, these may incur additional charges and possibly extend planning times.