
What about if train carriages held a lot more (and while I'm at it, maybe ore could be loaded by conveyor belts too)? And the character held a lot less - but was able to pull around a trolley, or have different size cars (trucks, trailers etc) and when they are within a certain distance the character can use those ingredients for recipes.
The wooden, iron and steel chests all go up in size pretty fairly so I just think it would make the game more interesting.