This mission requires you to spend 60 nanopods on a building, the Weapons Factory, which unlocks three premium nanopod units, then spend an additional 30 nanopods to train the only one of the three units that has somewhat acceptable performance, the Bazooka Squad.
The Weapons Factory will also use 3 of your population for eternity unless you can bring yourself to delete a building that costed nanos.
I saw that Madrona removed that other nonsense mission to build a Bunkhouse for 75 nanos, which I thought was great, but I think this one should get the axe too. Furthermore missions should never require nanopods to complete. As a hardmode player (F2P), if not removed, this will clog up my missions menu for the rest of the time I play this game.