One thing my buying experiences have taught me: what I thought was really important turned out to be not a big deal, while things that seemed trivial turned out to be important.
Yes, a Class A or C is easier to set up, but you are talking 5 minutes rather than 10. Is that 5 minutes saving worth it? Only you can answer that question.
Yes, a motor home can be set up in the rain from inside, but how often does that happen? You can always buy a poncho.
From your bio, it seems a travel trailer would suit you. You might consider a used unit and see if you like it.