Have you looked at http://www.rightmove.co.uk/property-for-sale/property-67265432.html* as posted by Rainbows* ?
It looks a much better buy imo. Cheaper, better garden, better decoration, nicer kitchen, better lay out, less maintenance, better primary and secondary schools, less congested neighbourhood, and still close to green spaces and the seaside.
The "living room" as shown on "layout" could be easily turned into a nice space for your mum. More easily than in the house you are enthusiastic about.