I would get some window liner to keep freeze away and keep them by the window it makes it so they can still very slowly grow but have no shock for storage or cutting leaves but u have to angle it right so the pups get light too OR a tall window like a sliding glass door so everything gets light
and for the pool thing I've seen them as close as 3 feet when I went on vacation I asked them because these were 13 feet bananas and they said they put one huge sheet of metal that went around 1/2 of there pool so if you want just get 25 gallon buckets from a nursery and put it in the ground so you cant see it and put them in it so you wont have to worry
simple fix the only down side is that the pups cant spread out but clearly you use good soil if you go a bunch of pups already