Hi Laz
Although you put this post up in May I have only just read it, but I see noone has replied, now that you know about the walk up to your place, from centre Akbuk dont you think that is enough exersize for you and Dave. Never mind Yoga etc what you and dave need is a good couple of bikes, or you could get a tandam - but then that would mean Dave doing all the work (wouldn't it)
Perhaps some members could give you some idea of where to get a couple at reasonable prices, and I dont mean those noise motor things just cycle bikes, me and tom will join you with our bikes when we are over and when Ive lost this weight.
XXX MO