If you shrink the model to 125 mm length, the dish may become problematic, as the individual strut components will become proportionally smaller.

I have no experience with using a service, although the prices are quite amazing, but not surprising. A miniatures modeling friend had a 25 mm figure done with the MultiJet method for US$45, I think, barely a thumb's size.

I've a question or two, not suitable for open discussion, sending via message system.