as a parent myself, i understand your frustration but from a childcare worker pov i think 24hr childcare is a great idea provided centres provided better security features for the centres and the centre isnt abused by people who just want an overnight babysitter. I hope you find care that you need.
ps. have you thought about advertising for a uni student etc? lots of people i know studing for teaching roles work for in the childcare industry until they are qualified. maybe you could do a babysitter type arrangement?