hi there
if the council are cleaning the property at the present time, and a caretaker, they will just tupe all the people over to the inoming clenaing company,
you need to get hold of that info before quoting really.
it sounds like they are looking at a cost cutting exercise, in reality its a profit cutting exercise, cause you will have to take the exisitng staff at the same rates etc.
hope that helps.
regards
martin