Don, you have my profound sympathy. A leaky water heater is a mess.
I had a remarkably stupid experience with a water heater recently.
Our house was built in the sixties. The original owners were two English professors at the university where I worked until last month. We bought the house from them in 1994, and I had the chance to chat with the original owners - who had been on hand for the construction process.
The guy told me that the original contractors had had the brilliant idea of installing the water heater in a corner of the kitchen - between cabinets, under the counter. They proposed to it in completely, with no access. To service the water heater, the cabinets and counter would have to be torn apart.
The owner blew the whistle and demanded that the water heater be installed someplace where a repairman could get at it. It ended up in a cubby hole under the stairs. (Houses in eastern NC don't have basements - for excellent reasons.) But the carpenters decided that ripping out the first water heater wouldn't be worth the trouble, so they just left it there. Completely concealed and inaccessible, under the counter. The original owner told me, "if you ever need a new water heater, there's one buried in the kitchen." Frankly, I thought he was pulling my leg - until last month.
My wife and I decided the kitchen needed a major remodeling. (Those sixties cabinets were looking pretty shabby.) When our carpenters tore out the old cabinets, they found the old water heater. Full of hot water. The previous owners and we had been paying the electric bill to keep that water hot - for about fifty years.
Aaahhhiiiyeeee!
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.