no frontend work, just a backend script which reads from and writes data into textfiles. should be done in 1 day!
1. one page with a list of individual room prices for one room
2. another page which shows information about all rooms to rent
3. forms to change the information on the pages and save them in text files.
4. the room data is read from text files and written into text files that you create
you find a detailed explanation in the attached JPG.
also the html code for the forms is attached.