I have to tell you...
I wish there was a remote forum like this one when I was 19 years old, building my first remote recording truck. A Remote Forum with a lot of great information and no fee. Freakin' awesome, I tell you.
Thanks for your first post. Keep in mind we only give correct answers on your ninth post.
Your needs sound pretty straight forward. Grab a piece of paper and a pencil and go for it. Come up with some ideas, even a few stumbling blocks and we'll try to help you solve them and take you to the next level.
Just a thought, since you want this vehicle to be designed for the specific purpose of traveling full time, maybe your studio shouldn't be built in a "truck"? Motorcoach, RV, an extended van or a shuttle buss could be the correct choice.
What did you mean when you said, "Will not need to incorporate into stage productions..."?
Also, did you have any questions about the other posts you read on this topic? There's buckets of information there.
If you want to get some ideas, scan the Net. They're a ton of sites from truck body manufactures. Check them out. Give them a ring or email them your needs and/or concerns. They are there to help you. Not sure if you're gonna get any free ideas. I'm not sure that matters to you, since money is not really a concern to your corporate client.
You could build it yourself if you keep it nice and new looking. If building it yourself doesn't work out, try contacting some of the links I left for you below...
Links to some of the TV Truck & Mobile Manufacturers frontline communications bickford broadcast e-n-g harris gerling group msi mobile technologies pk vans tv engineering wolf coach Some more food for thought.
I hope this helped.