Five cost buckets
Hardware
Cooling/capture components, fans, controls, reservoir and plumbing.
Power
Operating hours and local electricity rates can materially affect cost per unit of water.
Treatment
Filters, disinfection components, testing and replacement consumables.
Maintenance
Cleaning, component replacement and sanitary storage.
Compare cost per useful liter or gallon
A cheaper machine can be worse value if local humidity produces little water. Evaluate realistic output in your climate before comparing headline prices.