Kenny and Marty are a wealth of information and have recently answered some questions about stack thickness I had.
Another good source is Bingham's Projects.
http://www.binghamprojects.com/ That's how I started and a lot of others too. They have everything you need (laminations, how-to videos, blueprints, hardware, tools, etc.) and are very helpful in answering questions. Also, if you follow their plans, and order their lamination kits, you will come very close to your intended draw weight.
For your first bow, you will need to build a form and a hot box with adds to the price. So all together you'll probably have about $350 - $400 in it. It gets cheaper after that, and once you've built one, you'll definitely want to build another.
Good luck!