Paul, there must be a slope of some sort nearby. You could always take a short trip up North of Yarmouth to soar off the Waxham sand dunes. I also flew a Soarcerer [on Reeds] back in the '60s and it is a rugged design that can cope with anything from a light breeze to a howling gale.
From previous experience with small gliders, I would imagine that adding a power pod would kill its soaring ability. I would favour hiding an e-motor in the nose (useful ballast) with a folding prop then you can always remove the prop blades for 'true' soaring when conditions are good. Ignore the purist police - if a spinner and 'moustache' is good enough for Chris Williams' scale gliders who cares ?
Who needs big sites ? I built its little brother the Soarcerette to take on Cornwall holidays in the 1980s with handy cliff sites adjacent. That one died during a house move. I built another in 2012 that is still going strong. The Soarcerette can use ridiculously small sites- sea front defences, weapon storage bunds, hangar roofs, ant hills etc.