Your last question is something I have been considering myself, while its not in use so it won't get damaged that way, it is still out on the harsh lunar surface where asteroids, a build up of radiation and lunar-quakes occur. so my thought at the moment is to let them degrade at 1/2 or 1/4 speed.

That bug you mentioned with the repair ships sounds nasty, if this happens again can you please send me the save file before you delete/try to fix that issue. (once you copied the save you can continue as normal and try fixing etc)

There has been mention of having negative available population, just curios to what the most anyone has gone into negative numbers by? it should be -1 as the lowest, has anyone had lower than this?

If so, this is a good sign and an easy fix 🙂

I have seen lower than -1 but to be honest I think the game had entered a weird free-running state.   By that I mean that none of the resources were changing, building purchases were not deducting any resource.

Essentially a restart resolved it and resources then did reflect what I'd been spending (so I suspect it was just a dashboard update issue).

Other than that, usually I get stuck for building when it shows -1 and cannot build structures with '0' cost.

I'll do some more testing on this and if I get a value lower I'll post a screengrab - or you can have a copy of the save game if that's any use ?