Generator is a nice luxury and tough to figure out how to run out of an apartment given fumes it exudes.
There are other ways to skin a cat.
Main thing that crashes your tank when no power is lack of oxygen.
You can fix that with $10 pumps that sense when power fails and turn on automatically.
I kept my tank alive with $15K worth of fish for 10 days by simply using air and doing minor regular water changes.
I also manually fed the bacteria in the filter by running used tank water through it that had air and waste to be consumed by the beneficial bacteria.
Moving is trickier but can be done and is done all the time.
Leave it for last. Lots of buckets with lids with the same air pumps dedicated to each bucket. They will do just fine. I have moved many a tank in my life in the acquarium maintenance business.
All that said, that screensaver idea will be easier to feed, clean, move, etc.
