If you put 'air fryers' in the search box on this page, several recent threads will come up.
I'm a single person but I intend to get one that's large enough to do a whole chicken.
Mally/ I put in chicken, gammon, pork - in fact almost anything!
Yesterday I noticed recipes for making Christmas Cake in slow cooker - might give it a try!
Roadman, it is a small countertop fan oven with advantages. Living on my own I had a single air fryer. Dave brought one when he moved in and we used two.
We now have a Ninja with two smaller compartments and use it all the time for almost everything we cook. I haven't yet done what some do and "throw an egg in for ten minutes" though. :-)
The Ninja would be ideal for one person and save on fuel costs.
Perhaps the question should be the other way round.
Something also to be wary off is how many articles show the power saving. Conventional ovens do not run at 3KW continually - they have thermostats and some are pretty well insulated these days.
These mini ovens also have thermostats but generally are not insulated although are on for a much shorter period of time.