Pontoon Boat Rentals business. Business Overview Once again, this is a great little business venture to initiate. You can purchase used pontoon boats for next to nothing, and rent them out for weddings, corporate functions, or just to people who want to float around and relax on a warm summer day. Pontoon boats do not require much in the way of maintenance and are very economical to operate. You can charge rental rates of $100 per day or more for pontoon boats and moor them at...