The problem is that glass absorbs energy to break, polymer deforms to absorb energy. So you have something absorbing energy in two different ways that robs kinetic energy very well.

Even just a normal household double pane window with one thin layer of polymer on both panes will take a long time to bust through with a hammer if the outer polymer is bonded to the frame appropriately. If you put paper tightly between both panes top to bottom, you would be in for a task because the paper reenforces against the deflection the hammer imparts.

You aren't allowed to use tools with the money case, but ignoring that, you could shoot it with a .50 cal AP round towards the top and almost certainly make it through and then you just hammer and crowbar down to get the cash by peeling away the glass.

The other way you could attack it is to just drive a car at the far side from the support and hopefully peel the glass away from the frame enough to get in.

Even taking a hammer to it would be a laborious task to make any meaningful progress in a reasonable amount of time. A pickaxe would be useful, a framing hammer face less so.

Hammer drills are basically "small" jack hammers that can also operate as a drill. Put it in hammer mode and repeated chisel at it. it'll take some time, but eventually the glass will be broken and you can then deal with the polymer layers by yanking.