Consider buying a couple of big cheap floor rugs to help save the carpets while your kids are little

I’m sure you can actually hire carpet cleaner machines from Coles, I believe they charge per hour.

I found I needed to get ours regularly steamed

bi carb soda often works well.

We no longer have carpet but when we did we scheduled in regular cleaning of carpets with a diy carpet cleaner machine.

I like Bissell . They have good reputation