We have 4 DC and it's wonderful, I don't understand why you would run ragged?
Mine all help out, housework is teamwork, as a feminist, why would I take on the bulk of household chores?
I think the key is to have a kind, thoughtful supportive, hands on husband and enough space for every one, and an optimistic outlook on life as you are doing to be role models for a number of new little humans so it's a good idea to have good, healthy lifestyle choices. So healthy eating, fitness and helpfulness and kindness to each other are paramount.
Getting DC to put their laundry, toys, etc away, as soon as they are able, being able to make themselves a bite to eat when older, helps them not to be selfish or entitled and means not everyone is relying on one person to do it all.
So, teaching basic social skills and independent life skills is very important.
I don't have any sen DC so have not found it hard.