Tomorrow I will (hopefully) be bringing home some checkereds!

I was browsing around, and came across some quite near to me, only about an hour away (which makes a change!) which are already feeding on pinkies, so it's too good to pass up. Most seem to be on f/t trout fillet, which is a road I wanted to avoid going down again, even if it were only temporary.
I'm going to see them in person tomorrow, so hopefully they'll be happy and healthy and I'll be able to bring some home.

They haven't been sexed yet, so that'll be the fun part, but I'm fairly confident in the knowledge I have collected from here. Whenever someone posts a picture for sexing on here, I seem to come to the same conclusion... hopefully I have learned well enough! Hoping to get girls again.

The big question now is - do I get 2 or 3? The double viv is 3" by 1 1/3" and would be fine for 3 babies, but I don't think enough for 3 full-grown girls?
The bottom tank is reserved for 2 melanistic sirtalis, but I do also have a large glass tank which I could seperate into if needs be.
And I could always up-size when they grow...