It's likely to be around 30 minutes travelling time for each job as well as an empty calendar around slots -
Clean Sue's house 9.30-10.30, travel to Jim's house, allow for 30 minutes travel (15 minutes plus loading car, late finish at Sue's etc)
Jim's house 11-1pm
Lunch and travel to Karen's house 2-3pm
So if you wanted a job around school hours you've paid yourself £40 if £10 an hour. 5 days a week, £200 a week.
Set aside your provisions for holiday pay, tax, pension, emergency sick pay. Car costs including petrol (travelling to 15 jobs a week, car necessary). Your own mop, hoover etc and wear and tear on those.
You'd be working and travelling and washing your rags, refilling products etc in the evening, working and travelling about 30 hours a week for £200 a week.
As opposed to working 20 hours national minimum wage with possible paid breaks and holiday pay, sick pay etc included with possibly no car costs needed and just a travel in and out of work needed, at £156 a week.
And it's not easy to be self employed and run your own business.
Really paying over £10 per hour is not too much.