Well, I am 88 and a half years old. I have serious heart disease, with 2 by-passes, one 35 years ago and the other 15 years ago. I have over 20 angioplasties, a pacemaker, and 19 stents in place--I take about 30 pills each day. I need oxygen all night, and sometimes during the day. I can only easily walk a hundred or so feet--but I am still boating--if I ever finish re-wiring my 18' CC Caracal Catamaran.
We gave up the last C Dory (and it was a mutual decision between my wife and I) about 4 years ago. The reason is that both of us had several injuries related to our use of the C Dory, These were not the C Dory's fault, but related to our strength and balance. For me, the "straw" was when I fell between the boat and dock, badly injured my leg, could not pull myself out of the water. Marie had gone to sleep, and I was putting heavier lines from the boat to the dock. I had walked forward on the dock, and was trying to get back on the bow, to put heavier lines in place with a storm brewing. Marie could not pull me out, I could not pull out onto the boat, or the dock. My grip on the bow railing was failing--and not much to hang on too after that. I had Marie bring the inflatable dinghy--I didn't have the strength to pull myself into the dinghy. I could hold onto the dinghy stern, where I got aboard via our swim ladder and swim step. We were on a group cruise and we all tried to see how easy it was to get back aboard. Several did not have a boarding ladder or swim step--they could not get aboard.
Marie had scrapes and cuts on her legs which became infected and required months of wound care, and in one case a central IV line for several weeks and 4 x a day I gave her IV antibiotics. Both of these incidents could have been fatal--so our path became clear. We sold our C Dory 25, although we both loved the boat.
Mdcv. ake sure that you can handle all of the requirements physically. We made accommodations for tasks we could handle manually in the past--we put in a dinghy Davit to hoist it aboard, instead of pulling it over the bow. We made a block and tackle to hoist the window air conditioner into the front opening window, instead of "arm-strong" method.
The boat I still have, normally lives in a boat lift, I push a couple of buttons, and the lift brings the boat so I can easily step in, then lowers it into the water. A Catamaran is very stable. The decks are wide and as you walk around the boat, there is little tipping or heeling. There is plenty of room and hand rails. You walk inside of the hulls, So that boat is safe and at least 25" of boats and railing between you and going overboard. I believe as long as I can stand I will continue to use that boat, even if I have to take oxygen when driving or fishing. Please, understand boating was my advocation, Medicine was only my profession. I probably spent more time in boating. I have no regrets, and are glad we have gotten out of the larger and trailerable boats. If my heart was better, and balance, strength was better, I would still own the C Dory 25. Of course I have always envisioned a Viking funeral--but that sort of thing is frowned upon here on the Gulf Coast of Florida! Burning boats just seem to bring all sorts of attention. I still have that fantasy of buying a Nordhavn 62, hiring a captain and crew, Then sailing to Patagonia, the one place on this green and blue sphere I wanted to visit and didn't get there.
I wish you many more years of boating. As long as you feel safe.