Personally, I would avoid publishing the article on more than one site. The duplicate content may not earn a penalty but it will have a detrimental effect on your serps for the article. It would be best to have original content on each site. You could publish the same topic but be sure that you don't just "copy and paste". I think the time you spend writing 3 or 4 original articles will pay off in the short and long term.
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"If you shoot for the stars and hit the moon, it's OK. But you've got to shoot for something. A lot of people don't even shoot." - Confucius