I use 16% methanol and usually two or three stage it depending on how the conversion is looking after stage 1. With about 10g/KOH/litre because I never titrate any more and have nice dry oil. The catalysts aren't the expensive part of the reaction, that's the methanol!
And methanol recovery gives enough back to do a whole batch every now and again, which is nice!
I used to mix up the methoxide fresh for every batch but now I mix up enough for 4 or 5 batches at a time, it keeps well enough in sealed containers (used some after 6 months with the pandemic and all, it was fine!)