The first decision is whether we want to use an invented language, for what, and how often. This will determine whether the time or money invested is worth it. We should also decide if we’re comfortable with inventing phrases as we go along without worrying whether they make sense to linguists, a small portion of the audience. If we think we will frequently use extensive passages, or the world is one we intend to use for decades, inventing (or hiring) may be worth it. Time spent on this world building task is time away from another task; do we have the time? For those who are already making money with their work or can afford it, this is one of the few world building tasks we can hire someone else to do for us. It’s worth considering. The next recommended step is to buy one of the listed resource books, because even hiring someone requires knowledge – unless we’ve decided to ignore the subject altogether.