Anyone have any experience with tankless water heaters? We have a 1982 Sunline 14 1/2 RK and our water heater tank developed a leak. In looking at replacements, they seem to be rather expensive and I've found the tankless models, which would seem to offer more hot water than using the actual tank and are seeming to be cheaper, but don't know a lot about them other than what I've read online. Any help would be greatly appreciated. Thanks in advance!