The best thing you can do is look for someone in town or nearby that designs and builds commercial ponds. I've hooked up with a company to look at getting a 3000g bala shark pond created.
They can do glass for it, but I'm not allowed near it. They will send engineers to mount it and make sure the enclosure itself is built to spec before they even touch anything.
You could get some really good pointers from them, lay out what you want to do and they can tell you if it's possible or not.
Around here, they will design my entire pond from the ground up and it'll only cost about $65 per hour to make the plans.