Yes, all WH eventually die and leak. In an area where it can cause damage, it should be set into a drain pan with a properly hooked up drain, and if it is in an area where you may not notice, you want to run that drain somewhere you're likely to see it leaking. It's also a good idea to install some sort of safety shutoff device. One I like is www.wagsvalve.com which will shut the water supply to it off if it leaks. Many places in Texas have pretty hard water - this is tough on any water heater, but especially so on a tankless. WHile you may get away without doing any service on a tank-type heater over its life, that is certainly not true with a tankless, which will require service typically on an annual basis. SO, count that into the cost.