Sailing things right

Yesterday I got some new shiny things delivered: dc-dc charger (so I'm able to charge my lifepo batteries using the engine), 500A smart shunt (so now I can precisely measure the power consumption and gain) and a new mppt-controller for the upcoming solar panel.
Installed everything, checked out twice, found everything working charmingly... And then heard the sounds of dripping water.
Found out that the salt water pump decided to fail exactly at this moment.
Now I have three variants: 69, 160 or 400 euros to spend on fixing/replacement, depending on discovered damage.
All my happiness about new toys has vanished. :(