Whose advice was it that the TAVR might be risky in your case, and why are you second-guessing it just for the sake of one-stop-shopping? I ask my question that way because if the risk is considerable, you may end up with complications that preclude any further 'easy' surgery, more risky advanced and invasive surgery, and a much longer recovery than the one you're hoping to avoid.

If it helps, my 93 year old dad, already with a bypass in his neck to run around the only good carotid still with a pulse in it, just had a TAVR this summer. He came through like a champ, and the results so far are nominal. And, if the TAVR doesn't quite work for you, you'll have the invasive surgery and longer recovery anyway. Personally, I would try for the low-risk, short stay approach and hope for the best.