Hi. That all makes sense
yes i would go IP system
just put rj45 plugs on end of your cat5 and plug direct into nvr recorder .... no need for power supplies
what is your budget ?
also what computer system do you use
windows or Mac
We’re are you located
dvr or nvr they are both standalone
under staires ...... is this like a open plan
some recorders give off a little noise so something to think about