Looks like a typical indoor water feature setup... just that its using a glass tank instead of a fiberglass tub.
I guess if your column water feature is not too heavy and the weight is spread out on some supports, the bottom glass of the tank should be able to take the weight. The key is to distribute the weight of the water feature. You'll have to test and see. If in doubt, try to get lighter weight water feature structures (ie. resin cast rather than actual stone).
If there is no direct sunlight or light on the tank and bio-load is low, it can be quite low maintenance. If there is no filter, they you'll just have to do more regular water changes and manually siphon/net out any waste regularly (depending on bio-load).
Other than using plants to break the water flow, you could also just use some bamboo/wood slats or panels to create ramps for the water to flow over. That will help distribute the water over a wider area and reduce the overall current.
As for fishes, go for hardy fishes like guppies or rasboras. If the flow is strong, choose those fishes with shorter fins and more streamlined bodies, they are naturally more accustomed to stronger currents.
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