Possibly, depending on what is actually committed and on the documents; it is not decided by the payment calendar alone. Filing does not authorize work or travel, and petition approval alone does not either. Existing independent work authorization, if the person already holds it, is what would permit work before permanent residence.
How the stages line up around a payment schedule
The sequence runs from petition to visa availability, then an immigrant visa abroad or a lawful adjustment where the person is eligible and a visa number is available, then conditional residence, and later Form I-829, filed during the 90-day period immediately before the second anniversary. Where the law allows it, a concurrent adjustment filing may be possible. Chargeability usually follows country of birth, so a Canadian address alone settles nothing.
Draw the two timelines on the same page: the project’s construction and hiring plan, and the investor’s conditional residence with its filing window at the end. Conditional residence begins on a date, and the petition to remove conditions falls in a window measured from it, so the stretch in between is what the file must later be able to describe.