Help with what Rack to buy

So I have a V-180 for when my Bloods/SD Retics are adults. I ned to figure out which rack system to buy from reptilebasics for Juvenile and sub adult. Which system, the CB-70 or the VE-6 would be the best one to buy to house my pythons until they are large enough to go into the V180? I appreciate all advice. My price limit is about $350 if anyone has a different rack I should get.

The more research I do the more I want to buy the CB-70, but that wont work for the first 12 months of life.. HELP!!! is there a rack out that that will work until 3 years of age?

If I could figure out a way to use the CB-70 for hatchlings I'd be golden.

I think I am going to go with the VE-6 everything I read says that this will last for the first 18-24 months. I think I'll be able to buy the CB-70 rack later. Anyone care to chime in?