Is there a problem with electric Heater VS. Propane?

I have similar -- the furnace blows air onto the tanks so they don't freeze, so I end up using LP gas. The good thing is that all the combustibles (including water) are exhausted outside of the TT, so the air inside doesn't get affected.

If I had to save propane and had electricity available, one idea I might do, would be to put a Vornado or other heater that blows warm (not hot) air under the TT, then use another electric heater inside.