First, I want to apologize for the delay I had not realized I missed it. I had assumed that I would have been notified about this. If I was I missed it.
I think it would work. Each set of job details would be a “digital product”, you could put those details on a searchable post or page, and only those who have paid would see it.
If you are still looking to do this, let me know. I’d be happy to help you through it.