I recommend the Coleman Powerpack propane hot plate. It is low, has a large, secure cooking surface, is well designed with a heat shield to keep the supporting surface cool, and is all around very well designed. They sell it as a camp stove, but it is way too bulky to go in a backpack, but would store well in a closet, along with some quart propane canisters. I would want a dozen cans of propane to last for cooking and making coffee for a month. You can also get a hose that will connect it to a 20 lb. propane tank, but that's probably awkward in an apartment.
https://www.amazon.com/dp/B0009PUS6M...a-273400956902
If you think you might want to simmer something without scorching, buy a flame spreader.
https://www.amazon.com/Maxi-Aids-Sim...+for+gas+stove
For keeping a freezer frozen, a small camp generator is all you need. Energy star freezers only draw about 850 watts, the apartment sized Frigidaire is both cheap ($299) and efficient, pulling only 600 watts.
https://www.frigidaire.com/Kitchen-A...er/FFFC05M1TW/
The smaller the generator the less gas it takes to run it and the less noise it makes. Tiny camp generators are designed to be quiet enough that people can sleep. You would only need to run the generator a couple hours a day to keep an efficient freezer cold. Bring it inside when you are not using it. They have a distressing habit of growing legs and walking off if unattended, particularly since they are very portable.
Best Quiet Generator For Camping | Generator Power Source
If you don't want to store gasoline in your apartment, you can siphon gas out of any unattended vehicle, even your own in a pinch.
With a little prep you don't even have to suck on the hose. Practice in advance, since many cars are designed to defeat siphon hoses. Don't forget to buy a small gas can, though a clean plastic milk jug will serve in an emergency.
https://www.amazon.com/dp/B06X3XXG47...a-407288303007