Need to modify core of jomres component, only bid if you know this component.
Need to create a new tariff type/modify existing one so it works as follows,all properties are SRPs:
base rate for each room per night, based on 2 people
Extra people, rate variable for each apartment
Global discount/supplements for all properties:
% variable for low season/high season
% variable rate for special dates, several different ones throughout the year.
10% discount if bookings are over 7 days
Certain dates have a longer min booking period.
Please state in your bid how you intend to go about doing this.