Daniel -
Do you know what the humidity range is already? Do you have a digital hygrometer that records? You should!
RH percentage will determine (to a large extent) how many changes of air per hour you need. (60-70% == 3 changes/hour; 70-80% == 4 changes/hour, etc). If you want a deep dive on how to calculate capacity, here's a read .
You can get a single large unit or multiple smaller units. If you can reduce the volume you need to dehumidify that could help. If you have HVAC you could install an i nline system .
Here's a source for stand-alonecommercial units. Here's another .
Here is a system to consider for walk-ins .
Note: I have not used any of this equipment nor purchased from the vendors. These are not recommendations. I just did some quick research.
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clay - http://www.thechocolatelife.com/clay/