I like the models and am looking forward to implementing one of them myself soon.
I agree with Karlotta that they add a great element of variety and RP opportunity to the server, I also agree that maybe 1.2billion for a core 2 model might be a bit on the expensive side, if GM's could also also include a base rename and move within the system the base was built in (if the owner wants it, and its likely that I would want to slightly change my POBs position if I changed it to a asteroid for example) it would make more sense at that price. Then again a billion for move is kinda high on its own, but GMs seem to be nice to poor pob owners as long as your not too salty.