Ender-5 Max

With your budget and size requirements there aren't a lot of options. Used Creality cr-10 s5. Old slow and temperamental. Also a bed flinger so moving mass becomes an issue as height increases. Creality cr-m4 might also be an option, it's 470x470 on x and y. More modern than the S5, but still a bed

I havent ran into many issues with mine the nozzle replacement is super easy. If you have to take apart the printhead its quite fast. If you buy the combo you get multi colour printing. I love mine right now amd the support for anycubic printers is amazing. I do have some creality printers as well a

I currently have two Creality machines (K1 Max, Ender-5 Max). They both work well now, but they did require some modification to overcome design flaws.