YOU can of course move back and work in the US at any time. What you are proposing is to bring your wife over as an immigrant, and as the petitioner, there are domicile requirements. Montreal is notoriously more strict about this than consulates in other countries. If you don't have a set timeline or a concrete job offer, consular processing via submitting an I-130 to USCIS is probably the best route to go.
Make sure you are up to date on filing your federal US taxes.