I have read some of your posts in other threads and value your opinion immensely (particularly what you advised regarding prop shops in other threads).
However, I would argue you are of the Baby Boomer generation and your experiences were in a different time/easier environment. When you traded, the internet was still in its infancy or not around even. I would argue that you would find the game much more competitive now for a new entrant. What worked for you then is unlikely to work for you in 2019. You will see by the job ads I posted as to what level of skill funds ask for.
An example of this was a post I read on ET of a guy who was successful in 2006 in a prop environment. He gave all sorts of advice as to what worked for him. However, his advice became less and less applicable due to structural changes in the industry and, in fact, the prop model has all but ended (apart from selling training or making money from overnight financing). It did not happen overnight but happened slowly. What worked for him 10 years ago, does not work now and could be quite dangerous to your net worth. You will find a lot of people giving outdated advice from less competitive times (a lot of mentors and gurus fall into that category).
Try speaking to a top hedge fund with your MBA and Fortran skills today. Very difficult. Actually, even your NYU MBA could be regarded as elite to an extent. I did a quick Google search and fees are $100k plus. Probably you paid a lot less, in real terms, when you did it back then (there has been a student loan bubble since then). Even so, I would argue, it would still not be enough today, in my opinion, unless you had a very very solid quant and programming background as well as a high level of intelligence. Sales, however, is more forgiving.
My overall point being that a lot of viewers here are totally unaware of the level of competition at the top. They are often misled as to what is possible. They think a $7500 course and a 'I can work harder than anyone' attitude will suffice. Then, just like the film Limitless...they will get noticed, raise capital and set up a fund. It might have done even a few years ago, but not now. Or rather, the chance have decreased significantly since then to make it highly improbable. They have to be aware of just how high a level you have to be to have even a good chance to play at the table and who the competition are.
The best way is to study the bios of the top players. You will see elite degrees, high level presentation skills and usually very rich family backgrounds and connections. Also, a certain racial, social and height bias. Once in a while somebody gets there who is different, but that is very rare
On a positive note....once you truly see the game you can play it this way
1. Get qualified - if money is tight and you can't afford a six figure degree- CFA CAIA FRM etc
2. Get connected - the the right geographical nodes
3. Present yourself well and learn to sell, negotiate etc. Learn to conform to certain social classes
4. Work for the right people
5. Get some quant and programming skills
It will increase your chances.