Another thing to consider... your neighbors might wonder why you're hauling gas cans into your apartment all the time, and any little spill or anything is going to make you and your apartment stink like gas/diesel, and the fumes are going to reek even if you're exhausting them outside. There are so many things that make it seem not worth the hassle.
I'm assuming the reasoning for this is that your landlord pays the utilities and you don't wanna draw suspicion, but it might be easier to come up with some excuse to be using all that power and offer to cover the cost. Tell them you have reptiles that need the lights and heaters on all the time, or something.