[Suicide Junkie]

Big problem with your plan, though.

The construction bases are pennies to maintain, compared to the cost to either maintain or unmothball the SM bases.

The best way, would be to build using 11 or 21 Space-station based spaceyards.

You just have to hold the queues when they reach 1-turn to completion, and you then don't have to pay any maintenance on SM.

would you rather pay for the unmothballing of 10 cables and 10 plates, ALL AT ONCE, or just 12% of the cost of the SpaceYards each turn?

even a small empire can support 21 spacestations with SpaceYards.

When all of the SM is ready, unhold the queues, and they all finish next turn. Use them right away, and you pay ZERO maintenance on all that SM. You can now scrap the construction bases.