Baby monitor

FTM here. Is baby monitor really necessary for a small house like 3 room flat? I’m thinking of buying one close circuit one that don’t use wifi so can’t be hacked. But my family says no need cos the house is small.. I’m planning to let baby sleep with helper when baby turns 6 months old, so at least I can monitor baby sleeping without going inside the room, but not sure how the helper will feel with cctv inside the room.. #pleasehelp #1stimemom