I agree with the other posters that 1-1/2 baths isn't really needed unless you are a family with kids (that's a lot of bathroom in the rig you linked to). Toy Hauler is probably the way to go if you have toys, but as much as my wife thought she would be spending outside sitting around, she ended up hating the bugs and ops for inside if not being active, so the larger indoor living space would be better in our case.
Rollaway Toolbox? Only if you intend on using the tools elsewhere for making a living. As mentioned most campgrounds won't let you do much maintenance that would require a garage worth of tools, just the basics. I kept a large Top Box for hand tools and of course the Cordless Drill/Driver. I just have to except the fact that I am not going to be able to have the space or tools to be able to change an engine on the truck by myself anymore. Others see my tool stash and still think I am carrying too much weight in tools. Hard to let go of being the mechanic I guess.