The House Maid Job is certainly one of the more peaceful things to do in CnR. To start the House Maid Job just visit any owned house and check if the "House Maid Job" option is available, if it is just select it.
You will end up inside the house to clean it. Every second or so inside earns you $100. The dirtier the house is, the longer you will have to stay inside to clean it completely.
When you finish the mission successfully you will receive an extra $1000 bonus and 1 score.