Musical enclosures

[EL Ziggy]

OK team, I'm kinda stuck. I need to order one or two enclosures and I'm not sure how to go about it or which sizes to go with. I'll explain my current setup and then I'd like to hear how you all would move things around. This might be confusing but here goes...

I have my 1.1 jungle carpets in a split AP T8 (4x2x1). The female is comfortable in her half but the male is getting a little cramped. Technically he's the only snake that really needs an upgrade right now. I'm not sure if I should move the both of them into a split 6x2 or give them individual 4x2s.

My young male olive and my female albino carpet are in another split AP T8. They're both fine but the olive is growing fast and may need an upgrade by years end. I know some keepers and breeders have said a 4x2 will work for him as an adult but I think a 6x2 is more realistic. The female albino will be fine in a 3x2 or 4x2 as an adult.

My coastal carpet is in a 40g breeder tank. He's just a little over 5 ft but the 40g is perfect for him right now. He'll end up in the 7-9 ft range as an adult. I think he'll be fine in a 4x2 as an adult but a 6x2 is a possibility.

My yearling Bredli is in a 60qt tub comfortably. He's growing slower than my other carpets and I don't think he'll need a larger enclosure for at least 6 months. Again a 4x2 or 6x2 will be fine for him as an adult.

I'd like to end up with only (2) 6 ft cages and the rest 4 footers but I'm flexible. WWYD?