i wash everyday if not more sometimes esp in summer when a load will dry in a couple hrs. i like to stay ontop of it all so it doesnt take me long at all to hang/bring in/fold/put away all at once. takes 10mins per day.
during winter we have 3 clothes horses inside and i am forevrer rotating dry stuff with damp stuff!!! i hate winter!
towles weekly or when needed
bed sheets fortnightly
8kg washer, 4 people.
oh and i have never seperated lights and darks - they all go in together and ive never had issues.
i have a soak bucket for stains set up al the time.