XML bot to sync from local server to web server

Hi we have a local ms sql database and we want to start selling our goods online , We have a website from mybigcommerce.com. What i want here is to take products data including their current stocks, price , name etc and sync it with our web site every 2 min i will provide you data in xml so I need to write script to check xml and update the web database , also it should create a xml as well to update the local server we we will know extackly how many stock we have and where we sold it my budget for is $ 150 so if you interested please contact me thanks