£0 remaining for two tall safety gates

Mum, who is caring for her four children who are all under the age of four, is struggling financially after recently separating from her partner. Her two year old son is currently being assessed for an Autism diagnosis. He is able to climb over the current stairgates, which is causing mum to be worried and concerned around keeping him safe. Mum would like to install tall safety gates in the home that he wouldn't be able to climb over, keeping him and the other children safe. Thank you.