Thanks. I'm actually a musician, but also repair musical instruments. I use the lathe once in a while, the mill almost never and would need to grind maybe a few times a year or less in a workshop that is very small on purpose
I have a 5in Bosch bench grinder which is quite compact. I don't think they sell them anymore but there are others about. It is significantly smaller than the 6in types. Mine is mounted on a board but doesn't need to be. I fitted diamond wheels to mine (easily done) and leave it sat on a shelf until needed.