you can buy ali extrusion cut to length at no extra cost or cut it on a normal wood chop saw with a tct blade. Good quality wood/ply or mdf is not cheap ether and far harder to get accurate or make adjustments. From just completing my first built I could not see the point in trying wood when the aluminum extrusion to makes life so much easier during the build at very little extra cost on a small build and you will end up with a far better product. like said if you choose the right parts you do not need any metal work experience and can probably do it with just a nice set of drills and a drill press and possibly a chop saw with tct blade and get far more acuracey and easier to upgrade when you want to.