Full Timing it? - 3 Kids, 2 Adults and a Chihuahuah

2oldman wrote:
... Fulltiming usually means retired and travelling around.

Not necessarily. But to the OP's questions, are you already experienced RVers? If not, I would highly recommend renting a Class A for about a month to see if you can all survive in it for extended periods. Do NOT treat it like a vacation, just plain old live and work in it.

Then think about how long you plan on fulltiming. Those pre-teens turn into teenagers and need more space and other teens to call friends.