All time spent with people is money - we took the best part of a day with one of their staff; an agent has to take into account people like me or those who spend weeks before getting sorted, not just the simple cases.
Nope; our deposit is controlled through an external company for security which comes with its own administration fee absorbed within the Agent's fee. Credit checks - although of little expense take people's time and attention. References - further time and money usually involving another external party.
The details of a landlord, property, client or other involved parties do not simply appear on a computer ready for that magical print button.
As you say, some of these processes might not have taken that long for them;
we could have been researching private only landlords, phoning around, arranging our own viewings when suitable for all parties, creating our own contracts, legally accrediting them, negotiating, finalising, doing inventory & countless other tasks but this was all entirely taken care of on our behalf with next to zero effort on our part.
I'm not sure what it's like in Manchester, but £185 to go from 'Hi I'm looking for a rental property' to 'Let's stick the kettle on and move our boxes in' is not bad going.