I have (ab)used a simple Bosch belt grinder for a while now.
However, I am working with a US friend to get me a KMG.

I know it is possible to build one myself, but it would cost me a lot of shop time.
Shop time is fairly limited, so rather than spend a year or more, tinkering to build me a rock solid belt grinder, I decided to just cough up the money for a KMG so that I can spend that time working on actual knives and razors, instead working on the grinder itself.