Run Ads For A Specific Profession

My sister is an accountant and referred a few of her accountant friends to me. I like them as clients and I would like to attract more clients like this. Female accountants who want to work on their marriage. When I go to run an ad there are many small interests, I would need to add a dozen different interests and job titles. Should I try a interest that they like/buy from or other thing specific to accountants? Or just run it to everyone that has the job title even though it is very small amount (4,000)?