Wooden Stair Gate (Telscombe Cliffs BN10)

Hi I need a stair gate ( ideally wooden if possible) as I’m setting up as a childminder. As the Ofsted process is so complex and is taking many months. Therefore a free or cheap one would really help as I have hardly been able to work this term. And spent quite a lot of money getting set up.
With And hoped to be earning by now.
Many thanks
Jasmin