Sprouting in an apartment!

My apartment does not stay the same temp all day.  When I leave for work, I turn the heat off and the temps sometimes drop down to 45 degrees F in the winter.  In the summer, without a/c, the indoor temps will rise to 85 F. I am on the 11th floor of a 26 story building - a solar panel placed against the window will generate some electricity but probably not enough for a heat generating machine.  I want to start sprouting sprouts again, on a regular basis.  I have considered putting shelves in a used low profile wardrobe and putting a tray of water in the bottom with an aquarium heater.  Any ideas?  I would like to be able to eat them here - tasty! but my main purpose is to learn how to grow them safely and use them, looking for the day when I am a land owner again and have more options.

If I were in your situation, I would have shelves with trays using fluorescent lights.  I would set up a shelf for the plant with the lights just above them.

I feel the heat off the lights will be enough.  My unheated laundry room stayed at 60' when the weather was -1 a week ago.

Here are some threads that will help explain my idea:

https://permies.com/t/139788/lights-growing-seedlings-indoors

https://permies.com/t/78778/lights-starting-seeds

https://permies.com/t/72247/Sprouts-Sprouts

Well, many seeds do sprout even in colder weather, they just take longer. So it's worth trying with a small quantity of seeds to see which ones will work in your winter.

If you need to reliable automate heat, get a seed heat mat and a temperature controller like this: https://www.ebay.com/itm/VIVOSUN-Seedling-Heat-Mat-Hydroponic-Heating-Pad-Garden-Seed-Starter-10-x20-75/313379350405?var=612257099660

Thanks!  I love interacting with all of you!  Someday I hope to make a road trip around North America and visit you...would get to other continents, but my van was not build like Chitty Chitty Bang Bang :)  Part of my objective is to be able to consistently and quickly produce sprouts of all kinds with minimal human intervention...still in pursuit of my retirement dream to have a small farm....  The heat mat sounds like the best option for me now because I have limited space to set these up.  If I had land and a permanent residence, I think it would be relatively easy to set up a solar hot water collector that would take care of the heating.