looked at a couple 2 years ago. BB didn’t like them. Not big enough for her dogs so I quit looking. I am not twisting her arm to go anyplace with me. BTDT, no more.

you're not gettin' it.
no "arm twisting". just do it. it is your Deida-quest. "I'm fixin' up this here trailer, and when I'm done, I'm hitting the road. You are free to join me...or not. your choice."

There are plenty of Airstreams around for comparable money to that streamline. the thing about the airstream isn't so much the "brand", but the fact that they made so many, and they're made so well, there are plenty of them around. The restoration hobby has had a huge resurgance over the last few years, and as such, there is LOTS and LOTS of support. available parts, and communities of knowledge. with an SOB ("some other brand"), you're kind of on your own.
heck, you can get a nice new one for the price of that motorhome...and it wouldn't be unjustified, because you're going to use it, dammit. stop letting her control your life.

and, fwiw, we have friends that have travelled across the country with 3 grown kids, a great dane, a cat, a bird, and a fish. that great dane is probably bigger than your menagerie, all by himself.
we see plenty of people with multiple dogs on our outings. For many of them, thats the reason they travel this way: so they can bring their dogs with them.