A photo-realistic wheelbarrow I designed for a farm scene. It uses PBR shading methods and is set up in an 'aging' node group. You can easily adjust the 'age' of the wheelbarrow to be anywhere from hardware store shelf new to sitting out in the weather for decades.
Simply import the wheelbarrow as a group. The wheelbarrow is already rigged, should you require an animation. The handles are parented to an empty located at the wheel. Everything else is parented to the handles.