The room is very spacious and value for money.
There are many food options nearby. There's a very long stretch of shops on high road, about 4 Chinese takeaway restaurants (chinese food is comparatively cheap) within walking distance. You can find cheapest food in Sainsbury (6 minutes walk north on high road) and Tesco (20 minutes walk south on high road) meal deals, pizza and fried foods (2 minutes walk east on Park Lane, and 5 minutes walk west).
You may travel towards Liverpool Street via Overground at White Hart Lane station, change at Seven Sisters Station for City of London, direct bus 259 to Kings Cross, and Stratford (Queens Elizabeth Park) via national rail at Northumberland Park Station. I've seen tourists buying single-trip tickets for public transport, which is a very expensive thing to do. Remember to get an oyster card before you travel!
Don't forget to visit Northumberland Park about 10 minutes walk east. It's very beautiful and quiet. :)