You can store your gas powered plane indoors if you take a few simple precautions. The main hazard here is fumes and the fire hazard they can present.

I store my gas plane in the basement. I pump the tank dry before I take the plane indoors. I plug the tank vent with a suitable plug (I use a rivet, it was handy, a fuel dot would do as well). Then I make sure the choke on the engine is closed fully. There is no odour more than a foot or 2 from the plane. With no liquid gasoline in the tank, the fire hazard is pretty much negligable.

If I didn't have a choke on my engine, I might consider corking the intake.

The plane's about 4' from the wife's washer/dryer, and I don't get "gas smell" complaints from her, so it's not bad! If your appt. is very air tight, there could be some minor odour in the storage room.

J