Instead of replacing each (crafting, smelter, weapons) why not just upgrade each as you progress through the game. Basic crafting table ---> Install iron fittings enabling more the creation of more items -----> Install robot arms enabling more items... ect Also moving the station will destroy installations. Making it an important choice on where to place it.
This feels kind of redundant. What would be the point of adding the past crafting table to the recipe when you pretty much still need the same materials for it to make sense? Also making it have an installation fee is somewhat useless when you hardly have anything set when you're building anything and making it have a fee for installing crafting posts would just end up being frustrating and not contribute at all to gameplay. Not everything needs to be like real life other than some technicalities just to not make it the most surreal space adventure anyone has had (for as good as that may sound).