It was build around 1996, there is no water tank in the attic however it has been removed by previous owners. I do have a garden with a eucalyptus tree in it. I might just use portable antennas in the garden for the time being. Getting the neighbors and XYL used to antennas in the new house/garden slowly 
I also might get round to finishing building the resonant endfed with 1:64 transformer like on PD7MAA site. the 40,20,10 version is only around 11.5m long(<40ft) that would fit on my 10m fishing pole as a sloper. The fishing pole and installation would only take minutes.