Sorry... I didn't want to sound like a jerk. If you are going to create blueprints, and building plans, for making your cage and you want to sell and ship those to people that is cool, your choice, I wouldn't think there is really a market for that though. Reason being considering that most of the time on forums like this, people have fun taking pics of their buiding processes, what they used and how much they spent on it, and some will even provide deatiled step by steps accompanied by these pics, Then they post them for the community to enjoy, and learn from... Just to contribute to the community. It is the sharing of ideas and knowledge that makes this community so valuable. As a draftsman you may be aiming more for something like if someone wants to make a real neat custom cage, you could be contracted to draw and design their cage for them, and maybe even build it! You definatley did a great job on your cage.