I'm thinking of getting the Ekorre or Svinga for DS who has ASD. But he's 7 now so the fitting needs to be secure enough to handle him as he gets older. I'd rather not install it myself, would a handyman type service be able to find the right place to fix the hooks and make sure it's secure enough for his weight? Or do I need something like a structural engineer? We live in a purpose-built newbuild flat. I would use the Ikea Ekorre hooks but what kind of screws would I be looking for?