Drupal eCommerce/Open Resort modification into Excursions Booking Engine

Looking for a Drupal programmer who can assist me in modificating Drupal´s eCommerce/Open Resort Modules into a Custom Booking Engine for Tours.

Rough details of project:

-1 Drupal installation to manage multiple sites with Booking Engine Module
-Back End for Several Users
-Inventory management for Excursions by Day and by Day Hours
-CRM Module
-Paypal and Google Check Out Integration
-among other features

If someone interested, please contact me through this site, so I can send specifics of project.

I don´t have a huge budget for this project, but some Dollars are looking to change hands :)