Wow those cars look great! I love the finish too. Great work here. I follow as much as I can. I have made small molds with varying success. It's an investment I think to make molds as big as you are making. I'm always tight on cash. So I have to find ways to make stuff cheap. The molds that you make, probably pay for them self fast when creating multiple cars or engines.
I have so much stuff, that I don't have room for more. I wished we had moved into a bigger property. I am blessed with what I already have. So I just dabble in smaller ways now. I had dreams of several different long trains built like an Army train for example.