I'm a bit wary because he's in a few different places clearly encouraging sex workers to use a 'specialist', whilst operating in a smallish town.
All accountants are discrete, they don't talk about their clients, if they do they need reporting to their professional body. I've never been sneered at or treated differently. The accountant I used treated me with the same respect as any other person using his services.
He could however be totally bona fide, simply offering his normal services whilst not causing any local excitement.