To start, 41 years old isn't "ollllddddddd". There are many here (including me) that are also in their 40s and 50s. And also, as a side note, I don't like the term "mid life crisis" -- not sure why though...
... I guess it is kinda accurate as it is causing lots of evaluation of what you want to do, etc. etc.; but at the same time, it also seems to have connotations of being stupid (Ferrari, divorce, etc.). I guess when I was younger, I also used that term, so perhaps I shouldn't rant on this. Oh well.
Anyway, what do you do in sales? I know quite a few friends / acquaintances in sales. The majority, I think, are in technical sales, meaning selling hardware or software (working for the vendor). And I also think, that the majority of those are selling into the finance industry. IMO, it is a lucrative place to be -- especially, if you are in capital markets. On the other hand, yes, it is also brutal. I don't know how my friends do it. I spent many years doing sales support, watching and trying to learn, and I still don't know how they do it...
Not sure if I have any advice... but, from what I have seen, the professional network of account reps, are ridiculous -- as it is their job to build and maintain that network. Can't you use your professional network to investigate what you want to do? And then use that network to help get you there?
Henry