No. Joining-family commitments attach to actual eligible relatives of the relevant principal.
Track each household one person at a time
A budget line is not a family relationship. Eligible relatives attach to one named principal, so each employee's relatives are recorded, evidenced and processed under that employee's case and nobody else's. In the underlying employment-based immigrant classification the derivative class is a spouse and unmarried children under twenty-one; a parent, a sibling, an adult child, or a partner who is not a spouse needs a route of their own.
Record every intended relative by name, relationship and date of birth at the outset and watch the ages, because a child who reaches twenty-one before the relevant point can lose derivative eligibility while the rest of the household proceeds. Each relative needs their own civil documents and their own admissibility record, and a spouse's history is examined separately from the principal's. Where an employer funds the route, confirm in writing what the company is paying for and for whom, since published terms have treated the principal and joining relatives differently and may do so again.
Say plainly to every household what the payment is: a nonrefundable contribution from the applicant to the U.S. government, plus a separate processing fee. It buys status for nobody, it is not an EB-5 investment, and it is not a visa category of its own, so any relative would follow the underlying EB-1 or EB-2 process with its own eligibility, admissibility and visa-availability questions.
Re-verify the published terms directly before money moves. An employer's decision, a colleague's payment, or a family's own relocation plan grants nobody residence or permission to work. Ask a U.S.-licensed immigration lawyer about each relative's own position before making commitments.