Begginer in modell-bau

  • Hi everybody,
    to be honest, as im informed before there isnt any chance to find, at least in Europe, any excavator, bulldozer, or front-loader, that my present budget can sustain.
    So, i would be really pleased for any information, tutorial, or step by step project on how to build my own excavator, dozer, or track-loader.
    For example, i´d like to build Liebher, or Caterpillar D9 bulldozer (perhaps that excavators are more complicated), and so, how can i build undercariage, chasis, engine transmision and crawler trax. And how to build body, which material to use, and how to assemble it?
    Do i need some proffesional supervision, or can i build those by my own self?

    I would be very grateful to any information i can get.

    Best regards

    Edo :Danke1: