@Mika: from the main component Vik Rent Items you can set a 'Custom Starting From Price' for each Item. If not empty, the system will read it instead of calculating the base rental cost for one day. However, the module doesn't let you specify a label for the starting from price like the component does. You should change the module default language definition in this case.

Hello Mika, that field cannot be empty in the component if you want to display a custom rate, rather than having the system calculate it. What you control from the component is the output for the view 'Items List', not the output of the module, except for being able to set a custom starting from price. Just set a custom rate by editing your item and for the component you can also specify a custom label, like 'Per Hour' or 'Per Day', as I said in my previous comment. For the module you will have to rename or override a language definition because the labels 'Per Day' or 'Per Hour' cannot be modified like in the component. Please open a support ticket should you have any questions as this is not the best place to continue the conversation.