I have diagrams and they are working on the contract now that spells everything out that is included. Compaks is a major RV provider for the entire planet. It would be similar to ordering a new custom RV from any US manufacturer from a risk perspective.
If you are interested in nitty gritty specifics as you might move forward with me, please PM me, as I don't want to distract from this thread more than needed. But I viewed about 5 different layouts and choose a layout that I think is far superior to others that I have seen. It's also more expensive with more content. I could order a D15 style from them for thousands less for example, but I wanted the best I could get. What I would say about my layout is that it prioritizes the traveling lifestyle with wife and my one kid but I would never 'live' in my RV. I find most configurations, like the Opus 15 for example, have more clothes storage than I have at home in my home master closet. Which just seems like a colossal waste of space. The kid is up front in a bed that's converted from a dinette where you can face the others (huge advantage imo). I want privacy with my wife at the other end of the trailer. We also have curtains that provide privacy for my kid up front as well as us in the back.
You have the exact same warranty that you have on any RV. The manufacturers of the various systems warranty their components directly, and you are essentially on your own for everything else. They do have a lifetime warranty on their frame structure (something you don't get with a US manufactured RV) but I have no idea how you would claim it. Taking your RV in for service is pretty dumb. They hold them for 6 months and then don't fix them right anyways. Anyone that buys an RV needs to be a DIYer. You of course can claim warranty on latches and what not and they will send them right out, but it'll be coming from China.
I will say this, by the time you order from China, ship it, un-pallet it, pay import duties, ship it across the country & mark it up, well any price less than $40K is VERY fair, even for a D15. This project isn't about saving money, it's about getting a superior product.
If MDC offered the same layout in stock right now in the USA, I would stroke them a check today for it. But they don't.