Home Network :: Configure Two DSL Routers In A Very Large House?

In my house I have a BT Business Hub wireless router at one end of my house. I am looking to extend the wireless range of my network into the kitchen at the other end of the house, which is a rather large distance away. The house is 200 years old with large corridors and thick walls. There is absolutely no wireless range from about halfway between the office and kitchen. I initially tried two powerline adapters which did not work. Having spoken with an electrician who carried out a rewire on the house, I have been advised that the two areas are on a separate ring main.I considered using two wireless range extenders, but have been told that the signal is halved for each extender that I use.So, I have had the idea of trying to use two DSL routers at each side of the house. There is a phone point in the office and also in the kitchen, where the second router would plug into. These are both on the same telephone line.