Does the spidertron cost increase on the space expansion or anything?

I've always built as many as I wanted from the fish I get by accident while building other stuff.

I just built my first fish farm and it appears that one cannot improve the quality of fish. Anyway, I had enough bits lying around to build 5 spidertron as soon as I unlocked the tech so I guess it’s pretty simple. I copied Nilaus’ parameterized mini-mall and then adapted that for assemblers and biochambers so maybe it just seemed easier.

You can even cultivate fish in the Space Age. It involves interplanetary logistics though.