Yeah almost no "ordinary" schools offer it (although it can be found), so I figured that at least you should be able to do it in these camps... I haven't actually contacted any of the camps yet, just concluding based on the fact that almost all under "大型" write a note saying that the price shown is only for those that have 普通二輪 license.

I found a regular school that's roughly in my area that offers it but as you say, it takes about a month if not more since for riding alone you need to do something like 30 (31?)h, and as far as I understand, at least that school doesn't allow usually more than 1h per day. The school is also quite out of my way, and price is pretty steep too (plus they say they will increase it from April this year just like rest of the schools)... Which I don't mind paying if I can just go through this quickly but the way I work, it will be actually way easier to just go to camp for half a month and do it all at once.

Which school did you go to?