How much do you think you would need to budget to get this place (a) comfortably livable and tidy outside and (b) complete the proposed extension? It could be a lovely home.
https://www.zoopla.co.uk/for-sale/details/64868503/?searchidentifier=8e3b54df87502d91f4d218c27a93010d2456afbc6037d25c274d7efb28bb6b3d