Wireless network house suggestions

Hi folks. Hoping someone can help me out here.

My problem is I live in the middle floor of a very old building. It is a rental so I have no way of drilling through walls with ethernet cables, or of running cables along the ceiling or under the floor. I have my internet coming into the house through the Lounge but also need access in my office at the other side of the house. I have shown a drawing of my layout.

My internet comes in via a Virgin Media Superhub. I have set up a wireless network (network 1) from here which my laptop and phone connect to when in the lounge. This is hardwired into a Time Capsule. The time capsule has a second network settup (network 2). My apple TV, TIVO, Philips Hue basestation and Blu Ray player all connect into the internet hardwired at this point.

The blue circle in the drawing shows the limit of the wireless signal strength. I have therefore set up an airport basestation in the hall to 'extend the network'. A third airport basestation is set up in the office and I wanted to extend the first one all the way here but cannot find a way to daisy chain the networks.

I use the Philips Hue lighting system, and Belkins WEMO switches, as well as apple Airplay into some of the rooms. Since I moved home I cannot get the WEMO's to work, have no internet in the office and my airplay is sporadic.

What I am hoping for is some advice on how to set up the network! I would like one wireless network that everything connects flawlessly too, that extends as far as my office and is as fast as possible. I would like as few access points as possible as WEMO has difficulty when there is more than one. I would be eternally gratefully to anyone who can assist me and help guide me on setting this up. I am a complete amateur when it comes to networks.