ok, so I do not have an RV, but I want one in the worst way. Can't afford one so I live through all of you reading the forums. :) so maybe that disqualify's what I have to say, but as a dad of three girls all under the age of 6 I have some advise.
I think you would be making a huge mistake. Your a new family, so you don't know, what you don't know.
First, all that travel time. It's pretty cruel to basically strap your kid into a 5 point harness for extended periods of time. That 8 hours of driving? Expect 10-12 hours. You will need to stop to feed the kid and just give them time out of the car seat.
Second, you are going to wait until he is one and travel for a year? The one year mark is a pretty important developmental time. They will be learning to crawl/walk. They need lots of space. They will be pretty board going up and down the camper. Not to mention sharing that tiny walking space with 3 dogs. They also use this new freedom to explore their surroundings and being caged up so to speak will not that. It's pretty important for brain development.
third, they will be learning to eat independently. Got room for a highchair? Or are you going to hold him in your lap during dinner. How do you like cleaning up dinner off the walls, the ceiling, etc. Cramped space means a fist full of spaghetti will be everywhere.
You mention friends and family to watch your kid? They going to do that for free? Cause they will tire of being your babysitter otherwise.
Your wife's current friends? Are they parents? Cause I have found that you tend to not spend as much time with friends that do not have kids. And being on the road makes it difficult to make new ones. And mom's will tire of always having play dates at their house cause they can't all fit in the camper.
And lastly, your a parent now. It might be your dream to be carefree and jet set wherever, whenever. But once that kid pops out, it's no longer about you.
Personally I would do as others have said. If you can afford it, buy whatever you like and do weekend trips and keep the house.
So, anyways. Hope some of that helps. I envy your ability to even be able to make this kind of choice. :)