Most diapers only get pee, but cloth diaper are more difficult to use, let's add 2 extra minutes, 4 or 5 times per day.
No solids means "not hard rock solids", they still make a nasty stinky brown paste. Hopefully only once per day. But that diaper MUST be partialy hand-washed, don't put it as is in the washing machine. At least a partial hand wash and then go with the rest to the washing machine. This is like an additional 5 or 10 minutes.
So it's like half an hour of extra sleep for $3, and when you have small kids sleep time is never enough.