Herman, leaving the heater on continually would concern me about an electrical malfunction and fire. In your mild climate just plug in the strip heaters when you get to the hangar and I'll bet that in 1/2 hour (about the time it takes to do your pre-flight and prepare to fly) it will be warm enough to start easily. I use a cheap "milk-house" heater whenever it is 40F or below and one hour of heating is plenty for me (my engine 912uls has the soft-start).