Electric baseboard heat

My basement has both water heated baseboard heat and an old 220 built in fan forced electric heater.The fan forced one I disconnected years ago because it sucks down electricity at a rediculous rate

I need to add more heat to the basement...mostly on those sub freezing nights.My problem: getting the waterline & return to the other side will require alot of work that I just don't have time/energy for.
But if I used electric for that end of the basement the panel/breaker is already right there.

So...my question is are the baseboard electrics still WAYYYY expensive to run?It would be about a 12' run...
In other words I know zip about electric baseboard heating
Pros/Cons would be appreciated

J