I also think that this is plausible. It could explain why she was never reported missing (or it seems) despite being so young, and also being young, alone, and possibly in a new country where there aren't many people you know to keep you "grounded", so to speak, makes someone extremely vulnerable to being trafficked, in my opinion.
In my sleuthing for this case, I did discover the above information as listed on FLUIDDB and reported those findings on her Unidentified Wiki page.
However, I'm skeptical of several pieces of information listed on her FLUIDDB profile:
- FLUIDDB lists the heights of many different unidentified victims as 5'6, even when other sources, such as NamUS, have different heights listed, leading me to believe it's a placeholder when the official height hasn't been inserted for whatever reason. For example, when looking at their section on females between 11 and 20, all of the heights are listed as either 5'6 or unknown. If I recall correctly, there was one case where a height estimate of 5'6 was given for partial skeletal remains that didn't include the torso, any limbs, or the mandible. Some FLUIDDB profiles even go so far as to list the actual estimated height of the decedent later on in the case details.
- We have an article from February 3, 1981 talking about the murder, so the February 3, 1982 date is definitely wrong.
- The age range they give for her (21-35) is also likely incorrect. Even the article written within days of the murder said she was between 15 and 20, and since then, it's been implied that she was probably even younger than that, although NamUS still lists her as potentially being as old as 26.
FLUIDDB does have some other problems, such as odd pre-set age ranges that don't take into consideration any further narrowing down of a decedent's age (such as listing someone who was determined almost certainly be 16-19 as being 11-20) and links to forensic reconstructions that don't work at all.
Even at 5'2, at 90 pounds, she was still really thin. In response to what you said about her lifestyle, I was wondering if she could have been homeless for a while before resorting to prostitution as a way of getting food.