Help me pick a size of a wall-mounted rack please

Hello! I need some help with picking the right rack for my house. Can you please help me? So far I think I should be all right with 19" 18U 600mm depth rack. Or should I go even bigger? In rack, there will be: - Switch (1U) - Router + RPi with Home Assistant (or maybe HA-green to support em) (1U?) - future media-server (rn I'm running only Jellyfin on an old laptop, but in the future, I'd like to build something that fits the rack, maybe some 19" rack case for atleast 4HDDs so probably 4U?) - keystone patch panel 2U (I have currently 24 cables I need to put into rack - sensors, cameras, outlets... but maybe I'll need some more later?) - UPS maybe 2-4U? Will I need something else in my rack? I think that this should be it, but I'm not really sure. Thanks for your help!