Most trade mags survive on unpaid contributors. So if you can string a sentence together, have something decent to say and are willing to share your insights, I’d say: what are you waiting for?!
How to actually make it happen? Work out what mags are getting into the hands of your prospective customers – and look at their content. Come up with an idea that would suit their readers and then make a brief pitch to the editor. They’ll let you know if they’re interested in the story – then all you need to do is write it.
Depending on what and where you’re submitting, the same (or slightly modified) story may work across multiple sources. For example, a web based article listing will likely have a different audience than a print mag – so neither will be too concerned if you’re article appears on both.
If you decide to go this route, I’d suggest having 4-5 article ideas up your sleeve – as once you’ve been published once, you should aim to repeat the act every 2-3 months. It costs you nothing but your time and energy – but does wonders for your reputation and awareness.