I don't think, I know! There is a guy a couple hours away from me, as an example, that will make a ~120 tank out of acrylic for ~500.
As for a nice stand and canopy, simple DIY can get you whatever your heart desires. I'm far from a carpenter, but was able to build a nice table for my first sw
tank without trying too hard out of scraps I had in the basement. Even the cheapest, most garbage wood can look nice after several coats of polyurethane. ~free depending what you have around you
A sump doesn't have to be another aquarium. Any container that can hold water and won't leach anything into the water will do. I'm planning a large build in the future and plan on using plastic water troughs that farm livestock drink out of. ~150
To prevent fish from jumping, some commercial egg crate will solve this issue. It was pretty cheap at Lowes...you'll find it in the commercial light section. You simply cut it to fit. Don't recall what it cost me after so many years...I'll find a picture or take another one of the top of my tank to show you.