Ford-Club Finland

Sorry for texting in English, Greek living in Finland.

So, I just bought a Fiesta Vignale MHEV that doesn't have the block heater included.
I live in Oulu, the car is mostly parked in an indoors garage, but it's still a cold indoors garage, what do you think? Should I install a block heater or is it something that I could live without?

Thanks!