On Thu, 29 Jan 2015 22:08:05 -0700, gary wrote:

Looking for a thermostat that will allow the temp to be set up or
down temporarily, and after an interval, will reset to the
pre-programmed temp.

Also, to enable/disable the whole house fan, then also, after an
interval, reset to programmed value.

Not finding what I need on the internet, probably because I don't know
what it's called or described.

Here you go. WiFi thermostat on Amazon, "only" $283 and change.
http://tinyurl.com/l4ck3qx Hook it up to the one WH and you're set.
Oops, it's only 3000 watts. WHs are 4-9kW.

How about this combo? http://tinyurl.com/qcz4atj controlled by this
http://tinyurl.com/o34jbvq

Be sure to set up alarms to tell you when you've been hacked.

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