The larger Alocasia, Odora, Macro, etc we winter quite brutally.
Dig them up, knock off most the dirt, throw them on the GH floor.
Maybe once a month we spray the roots/stem.
They go dormant and look like green baseball bats.
Come Spring, pot and go on.... it's that simple.
Most of our Colocasia e's we let go dormant in the pot.
Just quit watering.
But the ones we Summer in the ponds, Blacks, Illustris, etc, need to be weaned back from the water.
In mid/late Sept we haul them out of the pond or water containers/gardens.
Let them gradually get used to less water.
We have wintered them as houseplants but generally it's more trouble than it's worth.
But some Alocasia, Hilo, Stingray, Sarian are very hard to get out of dormancy.
Those we do winter as guests..... lol!
C. 'Diamond Head'
C. 'Gigantea'
As yet Unknown C.
Congrats Ric sounds like a winner business. Don't get too busy to visit us on cubits though. 
greenhouse envy. I have a postage stamp yard sectioned into garden rooms which makes my garden appear larger...but that doesn't mean I still don't want one of everything 
When space is so limited gardeners must be very particular as to what stays and what goes and if it's not gorgeous it's out!
