Our price for additional services is also hourly. Is this supported?

In the field settings, select the Paid checkbox and enter the price. Then, check the Price for each step option. This means the specified price will be multiplied by the number of steps—for example, the number of hours booked for hourly rentals. For instance: 'Monitor', $100 per day.

Let's see the result. Book a coworking space with two monitors at $100 per day for 3 days:

See it in action below.