Have a look at these commercial print washers made by The Imagining Warehouse -
https://www.theimagingwarehouse.com/...chival-Washers
Water comes in to a manifold and is then injected in to the bottom of each washing chamber and leaves over a wear at the top.
It is important that you can remove the intermediate partitions for occasional cleaning.
It is critical that at least one side of each washing chamber has a rough texture to create turbulence in the washing water.
I should add - Imaging Warehouse ship their washers all over the world and so it might be worth getting a quote for the cost of shipping to Paraguay
Martin