I am going to be copying this design http://www.aswexpress.com/art-supply.../0047045000000.

What wood should I choose? They built it out of oak which seems to be pretty standard choice amongst easel manufacturers. I would like to keep the wood costs under $100.
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Also, in its write up, it says that it tilts forward 60*, which is a ton, and based of of my guesstimated calculations, would be impossible given the apparent lengths of the pieces. I want to make a permanent stop for the forward tilt extreme so I don't topple my easel, but do not know how many degrees I should allow for? Originally I thought it would only be up to 10* of forward tilt (still more than thought I would use), but now I am unsure.

Thanks for the help