Hello Shoney, ( a proper name would be nice:D), welcome to the forum.
As Walter has said, Richard at "Toylander", Real Life Toys, is the place to go for plans, helpful hints and all the ironwork, electrics, motors and wheels if that is the route you wish to take.
You certainly need the plans, a good read of the forum for hints and tips and post up any problems you encounter.
Good luck with the build and keep us posted please.
Regards,
Brian.