I find the idea great. I think two days would probably be better to get into it, between hardware and software. And we are talking about modular time (for those who know about that time scale
I was wondering in what language you where hoping to do the workshop in ?
I was thinking about organizing something of the kind, next year some time, around where I live (South West France), but it would have to be done in french, and I don't think I could hope to have 10 people. And I would probably try to include in the price a few hardware parts (pots and buttons) (so probably a bit more expensive, it needs to be worked out)...
Anyway, I hope you find someone for your workshop and make it happen, it's great to see the axoloti community getting bigger, and initiatives like this (as well as @janvantomme 's book) is very useful to help people in the first few steps (they may need help getting out of it afterwards, because it's very addictive).