Hello, I have checked the attached floor plans and read your project description.
Based on original plans in pdf and your input, I would prepare simplified plans (walls, openings, furniture, room names; if you'd like, I can add floor materials or leave black and white as on your example). To compete this task I would use, autocad+photoshop.
Regarding the price - my rough estimate is that I can do 3-4 of these in one hour. My hour is 15$. Considering the number of apartments, we can lower the price/hour.
If you have any questions, feel free to contact me.