I am building an app for Vacation Rentals and I need help to build specific modules: 1) Rates - (e.g. 10/1/2012- 15/03/2012 $100 16/04/2012- 15/10/2012 $90 etc) - these have to be entered against each property/apartment on the system (equivalent to a product) 2) Booking form - when a client selects x property for x dates the price should show up automatically (depending on the date selected) and the system should automatically calculate number of nights and total price payable (based on the rates setup for that property) 3) Search Availability: create a custom search to find available properties in specific dates and location, and create booking from there 4) Give login to owners of each property so they can update their availability calendars or add more properties