Trevor, you are NOT the only one!! :)
My electro is in the garage.  I had a new main run out to the garage, with all new breaker box, and dedicated line for the electro.
I do leave mine running 'unattended', meaning I am present in the area, but may be in the house, or else where on the property.  I monitor my electro every 30 minutes or so.  I do not leave it running overnight.  
If a piece is not 'done', I shut it down and ... important here....
REMOVE THE PIECE and set aside.  Never leave a piece hanging in the electrolyte without the power flowing.... :)