What better way is it to attract people than to have a giant balloon at your event. This will surely catch people's attention and get your more visibility. Reserve now and make your business or event get noticed! You can provide your own banner of 4 ft tall x 8 ft wide but if you want us to provide one, please ask for assistance as there is an additional charge of $150 for that. Additional $300.00 premium for setup if needs to be at a roof top. Rock Rental charges 5% for credit card payments, no additional charge if paid by cash or check. Rock Rental's delivery fee is based on $2.00 per mile round trip without a trailer and the travel fee for 1 vehicle towing a trailer is $2.50 per mile one round trip from El Cajon with a zip code of 92021. If the location does not have a power source within 100 feet of the back of the unit, you will need to add a generator to your reservation.