You can setup client-specific pricing for different kinds of reports by overriding your default/global pricelists under the Client Pricelists tab.
Click on a client's name on the Clients page, then click on the Price Lists tab.
Each price list you've set up for different property sizes will be listed here. Click on each one and adjust bespoke pricing where necessary.
You can copy pricing updates between clients using the Copy from another client dropdown when editing pricing.