My son is (was) going to build a catio for my now housebound-forever kitty so she can have some outdoor time.
Was looking forward to it until he started a new job that he says is overwhelming him - so I may never see it!
I do have a porch room - and I’ve cheated a bit by letting her sit out on the back porch. Hard to bring in what was once an indoor-outdoor cat, she cries to be let out (she never left our backyard but the vet said not to even let her out there now).
Bon... see PM re Catio.