Just like anything, there is no "worst or best", it depends on your individual needs and preferences. To my knowledge, not a single person in this immediate area that has a mowing/maintenance business has an enclosed trailer. We are in a low crime area, and unlike an urban environment, parking space is not an issue for most guys, so open trailers work well.
Now, if you work in the "hood", and have to store your equipment away from your home in an unsecure or semi-secure area, I can certainly see the benefits of owning an enclosed trailer.
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