the thing is, you could be waiting a long time
I have tanks that have been going for almost 20 years now with no reseals..touches wood..
but they have been in one spot unmoved/never drained down completely either.
I was always under the impression that the real risk of problems goes way up when you take a tank that has had water in it for years and then drain in down and move it.
all the stresses change and the chance of a problem goes way way up.
I have fish friends that have 65s that have been going since the late 70's with the original seals and I suspect that might be why.