We had a helper until just before Covid. Timing was just right cos it meant I did not have to be responsible for another person during CD and all the restrictions. By that time, kids were already in their teens so they can definitely pitch in.
While slmkhoo and doodbug do not fancy having to slave over a stove, I do not fancy slaving around the house with a vaccum, mop and iron. So we hired a part time cleaner. I do not mind cook so even though I do work full time, I still cook almost daily. But to be fair I am not restricted by company working hours so I can get home by 5pm to prep and cook dinner and after dinner catch up with more work if need be.
Even though we have a helper from the time kids were young, I have insisted that kids be responsible for their own stuff and picking up after themselves. They have their own rooms and toilets so they are responsible for the basic upkeeping of their own areas. When we did away with the full time helper, they were fully responsible including cleaning their own toilets.
Kids prefer that we do not have a helper and though at times they do whine about having to clean their rooms. I do not really bother about how clean or neat their areas are. Basically their areas, their responsibility. If they choose the live in filth so long as that filth does not spill over to the common area or my area, I do not interfere much. So far both have kept their areas decent enough, DS more so than DD.