How easy would it be to grow a tree peony in a large pot?

Question

I have to move the tree peony which is around 1.5 m high. The only good place is on some paving.

Answer 1

Yes, easy enough, with a large container and a good potting soil.
EX17, is that a UK location? Here's an article from the Royal Horticultural Society. See the section on "Container Cultivation:

https://www.rhs.org.uk/advice/profile?pid=711