I had the same idea. The inspection process is too complicated. First, please ask the teacher to write the commonly used words according to a specific size, then scan them one by one, then use professional software to convert, process and modify them, and finally generate a font. The amount of labor is not generally large. However, there are professional companies doing this, such as Founder. You can search online. In addition, I heard that Su Xinshi, Shangqiu, Henan Province, successfully made a Liu style font, but later I didn't know how to convert it to Founder.
After all, the teacher is old. Before finding a better way, you can prepare some papers with the same specifications, and then download a common word list, so that the teacher can copy some when he is free, leave the teacher's handwriting and make a word library, so as not to regret it!