The term most people here would use for your job is “contractor”, not “consultant.”

A consultant, in most people’s minds, is someone they would consult with, who would tell them what to do, in an advisory capacity; not someone who would actually do any kind of work. (In other words, a management consultant.)

The only people who use the term differently are consulting firms themselves, because they think “consultant” sounds fancier (and worth paying more for!) than “contractor.”