GGG
A homeless centre or drug treatment clinic might be a place that can help you with hands-on 'research'. Outreach organisations, women's clinics, etc. can also be sources.
I did a third-year (university) women's studies research paper on women who worked daytimes in 'white collar' 'professional' industries but who - between low pay and high student loan debt -prostituted themselves to afford a 'middle class' life (rent own flat, run a semi-nice car, have good clothes for work, occassional holidays, etc.). I found a lot of my 'sources' through a classmate who worked as a stripper whom I used to tutor, however.