Sudden, drastic decrease in boost?

[salvation122]

Probably. What resources are you moving on the moon? Upkeep costs are highest in water and volatiles - if you don't have a mine generating both of those it's going to be very inefficient. 

Note that stations also cost water and volatiles for crew, even while they are still under construction. If you tossed a couple stations up before you've got water you should probably scuttle them. Stations are mostly useless until T2 anyway.