I could cite other scenarios—even more demanding than photography—where sex dolls are put to various uses. However, maintaining the dolls requires a significant investment of time, and they must be properly adjusted before every shoot.
If you are looking for a more affordable option, you might want to check online for occasional listings of second-hand dolls or manufacturer “seconds” (flawed items). How does your realistic sex doll express emotions? She was quite displeased when I told her how to install the washing machine.