I’m 100% with Matte on this one – even if you are in the city his solution is cost-effective in my book. I use an eartec system – in my mind even that is a much better deal than renting.
Here in Colorado there are no rental houses outside Denver. If I want to rent a set-up for a gig in Aspen it can involve a 5 hour hour drive to pick up the equipment, fedex charge to send it back, and 2-3 days rental.