Ok, here's another idea. Are there any programmable thermostats that allow you to have both the A/C and heat activated at the same time? I was thinking have one heater, set on low setting, (~650 watts), be always on, UNLESS, the A/C triggers, flipping a DP relay, shutting it off, until the A/C portion clicked off, and restarted the heater...
Meanwhile, have the other heater, which has 1k and 1.5k watt settings, triggered via the heating portion. I figure setting the A/C portion for 62F, and the heat for 60F, to keep everything tightly controlled.
All of this would be completely independent of my central system, which is now shut off at the breaker. (It just flat out takes too much power, to the tune of 9kw, AND blows cold air for the first minute).
Thus far, manually triggering my 2 space heaters in an attempt to hold 60F has resulted in my power bill following the trend of the temperatures... Downward.