Creating a network obstructed by concrete

So I've been given the task of finding and setting up the appropriate equipment to allow WiFi access throughout my compound. Theres one major obstable though, concrete (or the meshing inside, whichever). I've included a video to show you what the situation is, please view it before reading on.

Video (Right click, Save Target As)

So what kind of setup would be best? My current router is beside the TV on the first floor, with that I can get a signal at the front of the other two buildings (note theres one fourth building to my extreme right, you can ignore that). However, as soon as I enter the other two buildings or proceed to walk around inside them, the signal is reduced to nothing because of all the thick walls (I can only get a signal by the windows).

If you noticed, I've got 3 foneras setup in WDS in the building I walked through. With those I'm able to get wifi coverage throughout the first building, but I would like to think of that as a temporary solution (I had to setup 3 SSIDs due to firmware bugs :/) BTW, the 3 fons are at 0:08 (bottom right), 0:19 (on the corner of the little shelf to the left of the stairway) and 0:33 (on the tv, connected to my main router).

I was thinking of getting a Hawking Hi-Gain signal booster, and wiring that up to the router, and perhaps attaching a Hi-Gain antenna to the booster. Though I'm not sure how many I'd need, or if I'd have to use extra repeaters for that matter (slicing the throughput in half isn't fun). Also please note that running long cables isn't exactly an option.

Please Advise!