Thank you all. Yes, Ron, I did talk about having phoenix build the platform...they certainly could have done it prettier, but ultimately decided I better do it myself because it had to fit the crates like a glove and I would have had to send or bring them up (and micromanage every detail, which I'm sure would have driven them crazy). As Tom mentioned, I couldn't have them any higher without losing operation of the window and shades. I also want to be able to sleep on top of the crates with a small mattress on the rare occasion I need a second bed. The platform I built is only 7" high but I needed to clear the wheel well and I do use the flat underneath storage. It is a 12" step up from the floor to the top of the dog mattress, and my elderly dog is struggling with that so it looks like I will have to build a 6" helper step for her that I can store underneath as well.
I also need the future versatility to completely change or rearrange if I want different crate sizes, a different number, or who knows what else I might think of. The variety of crate configurations I have had in past years would make your head spin. Both the ClassA and the E350 van had at least three complete crate "remodels". Also I expect if I should sell or trade at some point it will be simple for Phoenix to build more storage and install a dinette or couch or bed or whatever the future owner would require.