Hey O'Henry, please don't give it away mate, you have a couple of options!
I can't see there's a great deal of difference cooling the wort in a pot or a NC cube, either naturally or assisted/ forced. Basically both methods rely on sanitary cooling, NC has the advantage of remaining sealed until it is needed. Putting hot wort into a cube thoroughly sanitises it though, whereas the pot is sanitary from a hour or more of boiling.
I actually cool my stockpot in the laundry tub most of the time and then pour it out through a sieve (catching whole hops and some break) into the fermenter the next day when it has cooled and then pitch a starter into freshly- aerated wort. The pot needs a lid, but as PP says, some foil will suffice and this skips the cube entirely. So, for now you could do much the same with your pot in the freezer? Or just do as you've suggested, chill it in the freezer and then syphon it into a sanitary cube (BTW, yes, hot water is OK, don't forget the lid and seal too! I often do...), but I'd chill it a bit further so the hose can handle it.
It sounds like you only have access to the stove/ kitchen/ whatever for a short while, in which case, NC is probably the best way to go, but to do that in the long run you'd be better off with the silicon tubing and if you can fit a tap to the pot it would be easy as, but this may not be an option so syphoning would be the way to go.
If your pot was smaller I'd even suggest just pouring it into a NC cube while hot (with a funnel and sieve), but this is only likely to work safely with a smaller pot. I did this for ages with a 20 litre stockpot and found that HSA, at homebrewing scales, is just a load of old rot...
Hope it works out for you! :beer:
