We do that but how on earth do you manage with only one load every 5 days? We are a family of 4, one teenager, one under 10, and we’re doing one or two loads of laundry every day.
pants can usually be reworn 2-3 times. occasionally a shirt can be reworn if it was only used for part of a day. this might require an unusually clean child. as a single adult, I do laundry on a two week cycle. and that's driven more by my inventory of season-appropriate clothing than the capacity of my washing machine.