The lives of 19th century women are known to us today mainly through their letters and writing, but also through the then new (black-and-white) portrait photography, and the vivid paintings, pastels and watercolours of impressionist artists.
The vast majority of sex worker organisations are not only grassroots and run by volunteer sex workers, but due to harmful legislation and policy such as the anti prostitution pledge, they are also often cut off from government funding.
Consent is conditional by design, it requires specific circumstances and/or conditions to be maintained continuously. The introduction of money or some material good as a requisite condition does not negate this basic fact.
At age 35 I quit an unfulfilling corporate job and started sex work as an independent full service kink friendly switch. My early days were filled with wild situations and marked by an utter lack of self preservation.