Why cause unneeded stress from making them live together and moving them around on feeding day.
Cons of them being housed together strongly outway the pros. Which there is only one and that being you only need to buy one of everything. A big enough enclosure will still only have one hot spot to fight over.
41qt tubs will last they're life unless you have a really big female. Go with the rack or even single tubs.
For babies they would need excess hides and clutter...
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