Not impossible. Nail the five import spots, and life gets easier for everyone. Key is to have two marquees to free up funds under the cap for other quality imports, and to not waste money on average senior players if they are inferior to juniors.
Saying that: I can understand if the owners are reluctant forking out money for marquees. The marquees after Ono and Spiranovic were, in general, questionable, or a waste of money.