Costs generally follow the standard TN filing pattern, with credential verification tied to the subject taught and any translation needs for foreign transcripts. A short assignment raises the question of whether the relative cost of preparation is proportionate to the contract's length.
Weigh preparation cost against the contract length
Ask what the total preparation cost looks like relative to a single term's compensation, since a short assignment may make some optional steps unnecessary. Confirm current government fees directly at filing time. If the institution has hired TN teachers before, ask what specific costs came up in that process, since department-specific credential checks can add unexpected steps.
Compare the preparation cost against a single term of compensation before starting, and say the number out loud. That comparison sometimes changes the decision, which is exactly what it is for. The items to price are credential verification tied to the subject, translation of foreign transcripts, the institution's own administrative steps, and the review of the contract itself.
Ask the department whether it has engaged instructors on this basis before and what came up, since a department that has done it once usually remembers the step that surprised it. Government charges depend on the route used and change over time, so confirm current amounts at the official source when the step arrives rather than budgeting from an older figure.