When something absolutely has to be done and cannot be put off, use the adjective imperative. Imperative is from Latin imperare to command, and its original use was for a verb form expressing a command: Do it! is an imperative sentence. It's still used that way, but it's more commonly applied to something so pressing it cannot be put off: Hiring new workers has become imperative..
1 A tandem (dual) axle utility trailer starts at $1,200-$3,000 depending on size and weight capacity, and it can cost $4,000-$7,500 or more for commercial-quality utility trailers.
Expect to pay $1,000-$4,000 for a single-axle enclosed cargo trailer from 4'x6' to 7'x14', depending on size and construction materials, options like dome lights, electrical outlets or additional doors or ramps. Trailers in this price range will be bumper-pull (using a rear-mounted ball hitch on the tow vehicle).