I didn't read every comment in this post, but there's another distinction the OP might want to know.
The difference between Class A Gas, and Class A Diesel - look similar but certainly different under the hood.
CLASS A GAS - is going to be much more similar to the Class C in regards to engine noise, pulling power, and suspension.
CLASS A DIESAL - is going to have that nice air bag suspension, along with that power house in the back. Further, depending on year, might also have a DEF tank you gotta fiddle with and fill. Not to mention mucho different maintenance schedules and higher costs if something breaks.
My take is this. 36 feet and longer - I want my diesel - whether it be a class a, a super c, or a show hauler on a columbia frame.
A Wee Bit Shorter? 26 feet to 36 feet, I think it would feel so much roomier in a class a body gasser. Got kids? Look for bunks.
Short? 17 to 25 feet? The lower cost of the class c would have me, and I can use the overhead bunk for storage. Plus it's very economical all the way around.
Shorter? 12 to 20 feet? Travel trailer or pup for me.
Consequently to the OP - I Started in a 40' Diesel. A learning curve exists
Your budget is going to be a big signal too - what's your thoughts on how much you want to spend to do this? I think it's a great idea, trust me, and it can always be done.