i dont know if it helps, maybe not.

In Germany you can theoretically keep anything, up to and including a herd of elephants. You just need to show, for some species, that you have enough money, enough time, enough space, and enough expertise and knowledge to do it.

And for many species, minimum requirements for the enclosure are set. Depending on the nation, even for ball pythons this often means that racks are a no-go. Big breeders in Germany tend to use a system of modular terrariums, these can be stacked.

So in the EU, at least you can have burmese pythons and reticulated pythons and green anacondas, no limit there, but the law gives you minimum enclosure sizes and so on to deal with. On the books is for example, for BPs, an opportunity to climb. It doesnt matter if it makes sense or not, BPs kept in the european union need to have an opportunity to climb. And the size of the ground surface is also given.

I dont know how it is in Ireland, but if its an EU member, maybe local laws are a problem, the EU does not ban any animals, you just need to be on the watch for regulations.