Exchange 'Equipment' calendars

I have been asked to set up some resource calendars for booking equipment out?
Is there any way of setting these up to manage multiples of the same item?

For example, 10 ladders?
I don't really want to create a calendar for each item!

We are using Exchange 2010.

I've done it this way before: https://www.youtube.com/watch?v=wy9O2oCqgZ4