If the card works (60% chance) then you get +8 WS for 6 turns (total 48 WS). Get two of these to work (96 WS) and then sell bonds (+$600). For the loss of 2 NM and 25 VPs you can purchase one of the ironworks interior improvements ($300 and 75 WS) that builds 3 IW and get +24 WS per turn for as long as you can hold the region where they get built. Looks like a winner to me.
I'm the 51st shade of gray. Eat, pray, Charge!