Marinas require heavy investment and have high fixed costs, so ongoing high occupancy is crucial to financial success. Construction costs for a new slip can be $60,000 due to permitting, durable materials, and soil testing. While most reservations are made by phone, online booking is increasing. Property costs and limited waterfront space inhibit new marinas, while existing marinas are sometimes converted to luxury housing. Larger inland marinas benefit from boaters relocating from coastal areas with hurricanes or high costs.