Epson - Where to Rent?

[tgphoto]

I'm wondering if anyone knows of a place that rents Epson inkjet printers.  I'm looking to rent either an R2400, 3800, or 4800 for a 1 day workshop on fine art printing which I'll be teaching.  Cost will be of some concern as the budget for this isn't huge, and I'm trying to keep the attendance cost under $35 per person, expecting a group of around 20 or so.

Does anybody have any ideas?  Chicago locations would be especially helpful as this is for a photography group in Chicago.

Thanks!

Tim