I avoid threads like this mainly because I dont want to burst anyones bubble. But pin at the ready.
You'd need a dedicated workshop, probably 400 sq feet minimum and a bank of machinery, you probably dont own or have experience in using. In ply it wouldnt be a case of buying ply, but rather making it. Likely a vacuum press or even 50 clamps.
Huge amount of quality drawings showing every part and section, and possibly even be able to think in 3D. There you'd need a strong idea, very very well thought out, and through ands taking so much into account.
Big flat bench, 7 or 8' x 5 or 6'. Use of hand tools ,use of power tools, and a fair amount of money to be able to do such properly. Custom made jigs and fixtures, all of which you'd need to make to hand as required, and would have to be spot on accurate.
I avoid even thinking about this because i can understand how large the amount of detail is, and not just the overall impression, the fine detail, an understanding of wood, how it works, its strengths and weaknesses. Plus of metal, and a high degree of accuracy to be able to combine wood and metal, and not have things set in wonky or out of true.
And a lot of money.
It's the type of project you'd propose for doing a degree, so a planning stage of 3 or 4 years and a passion bordering on mental illness.