Just one thing here, you say you do not swim, i would learn quickly if i were you, it might save your life one day. As your wife has mobility issues she most probably will not be in a position to help you out if you go in the water, or worse still she goes in, a life jacket/flotation device will help but you need to be able to swim. Every boat owner will at some point take an unexpected dip. About 20+ years ago i bought my first boat, a 25 foot Seamaster, on a marina near Bristol. Needed a good polish so the first Sunday of ownership there i am polishing all the gelcoat like a madman finishing at the bow, i take a step back to admire my handywork on the front deck. At this point i realised that if i had gone for a 27 foot boat i would have had some deck left to stand on instead of thin air now under my feet, so after a backward somersault of Olympic standards i then found myself admiring the condition of the hull and the anti fouling paint from a fishes viewpoint. I popped up out of the water, but i was lucky, i can swim, you never know when it will happen.