I’ve actually seen multiple examples failing at sub-one year… it’s ridiculous…
Okay, this changes things significantly!
— because this tank already needs to come down before you can set up the new once, I’d recommend doing it sooner, rather than later!
I’ve found that setting a new tank up correctly takes days to weeks of committed effort, depending on complexity and how many hiccups you run into along the way…
Given that it’s at least a few weeks, but likely around a month before you have the new tank in position, filled, and chemically stable; it could be a wise move here to acquire a 100-ish gallon plastic stock tank to serve as your temporary livestock/rock holding container!
This stock tank would allow you to break down your leaky display, and get it out of the way preemptively so the new tank/stand can drop right into place once they arrive!
Adding on to this, for the OP - if you go this route (which, as someone who went through the same thing last year, I recommend), set up your stock tank as if it's going to be the permanent home for your livestock.
In other words, full filtration, rig up your lights above it somehow, feed like normal, and do regular water changes.
I failed to do that when I was going through my transfer and lost almost everything.

