I would avoid trying to get all in one. Given print volume you may be better to get a colour laser (prices are a lot lower than they were 10 years ago). Then have separate scanner.
I know space is probably at a premium so it may not be an option.
Consider what material you print on, just paper or do you print onto stickers, t-shirt transfers.
consider print speed, just one copy or are your printing lots of the same thing.
Wireless printing, remote printing such as from mobile whilst on outing.
Look at cartridge cost. If you print mostly in certain colours it can be worth having separate colour inks/toner.
Recent canon Wireless printers I have found a pain to configure. Not sure they are true wireless as won't connect direct to device, have to use router. Is that the case with all printers?