@terraplane8bob Your experience and if still having access to your R2R Decks and Tape, it seems to me you should be a person of interest to others interested in pure analogue audio.
I don't see why those with a healthy disposable income does not make an offer to Hire You for a night of your sharing in your Career and presenting Analogue Recordings.
I would take a wild punt in the right City with the a particular venue and right organisation being involved, a few hundred attendees will be the minimum expressing an interest to be paying attendees.
Individuals with such an experience are in small commodity in the present time.