Here is a link to a site that runs a python script for crafting. The guide updates every two hours so if you are using it and in mid craft please do not refresh the page for it might have changed. When the guides update it checks the prices on the Trading Post, goes through all of the crafting and discovering for each profession and find the cheapest method for crafting. This is the best way to level any profession as of now. Across the top you will see a few selections you can chose from. Always choose 'Guides-Normal'. If you click on the 'Total' tab it will show you what the total initial cost is to buy everything directly from the Trading Post. However when you click on the guide you want to use it will give you a initial cost, expected recovery from selling things you've made and an expected final cost after you've sold what you've made. Please enjoy, I know I have :)
http://gw2crafts.saladon.net/