Surely the move made him anxious, but this type of vocalizing is a symptom
of an overactive thyroid. He is at the right age for it, too. Have him
tested. It is easy to correct, but if you don't correct it, he can have as
stroke. (It sends their heart rates out of control.) I caught our Boo's
late, and she is now on a beta blocker AND the hyperthyroid drugs because
her heart rate is sometimes unstable, possibly from having such a fast heart
rate for so long.

Have patience and understanding.  Give him as much reassurance as possible-
but not when he meows- and try to minimize stress in his environment as much
as possible- which may be difficult with a non-cat-loving spouse whose
probably exacerbating your cat's anxiety.

Boarding him for a week and moving to a new house can be a traumatic
experience for a cat- especially for a 14 year old cat who may have some
degree of cognitive dysfunction. Remember, he may be 14 to you- but his
physiology is comparable to a 72 year old person.

His whole world was changed abruptly. He's probably still a little
disoriented and/or fearful.  He may also be losing some of his senses-
especially hearing which may be why he meows when he can't see you and at
night.

The first order of business is a geriatric exam to rule out medical
problems. The exam should include bloodwork to assess organ function-
especially thyroid and kidneys.

He really needs your love and understanding more now than ever before.

Phil