Check status before duties. A qualifying E spouse is generally employment-authorized incident to valid E status, with proof such as an E-2S notation or the I-94 record; that authorization does not come from residence or from being paid. Confirm the spouse's own eligibility and application steps before writing them into the operating plan.
Do not rewrite the plan around unverified authorization
If the household now expects the spouse to manage the shop floor, that is a real change to both the immigration case and the budget. Confirm what proof the business will keep on file, and remember the spouse's admission period may differ from the investor's, and from the visa's expiry date. Consider whether hiring a manager, or seeking a separate work-authorizing route for the spouse, fits the household better than an assumption.
Ask what the spouse would actually be doing before asking what status permits it, because the answer changes the question. Unpaid help with a household business, paid employment in the enterprise, and managing it are three different situations. Hypothetical example: the spouse of an investor in a frame-distribution business plans to keep the books and cover the counter two days a week; that is work, and it needs its own answer rather than an assumption drawn from the marriage.
Confirm what evidence of authorization the business will hold on file, and note that admission periods for each family member may differ from one another and from the visa’s validity.