Before buying my short bus (Corbeil 14-seater on an E350), I called CT DMV to check that I wouldn't need a CDL or any other craziness. I was very clear that it was a small school bus, and they said that as long as it was under 26K GVW, I was in the clear.
So I got all my documentation in order, waited 3.5 hours at the DMV, and they told me everything was fine except that I owed city car taxes. Of course, I DON'T owe taxes, and I showed them this on the Hartford city website, but Hartford doesn't bother to enter info into DMV's database, so I had to go to city hall for a paper certificate.
The next day at the DMV, after a two hour wait, they said that actually, I couldn't register my bus if it was yellow. So now I have to get the damn thing painted. I'm sure that when I go back they'll tell me that something else needs to happen.