Before you lock inventory or ads, prove the model can carry orders, returns, storage, and payroll through Month 26. If the $12 CAC, $4.7K monthly fixed load, and $584K cash trough do not hold, delay the commitment.
1Demand Proof$45K / $12 CACTrack CAC, your customer acquisition cost, against the $12 target on the $45,000 Year 1 marketing budget and make sure repeat buyers show up at the assumed 15% rate.
2Fixed Burn$4.7K/moKeep the warehouse lease, software, admin, insurance, utilities, and subscription load near $4.7K a month, because that burn sets the cash needed before break-even.
3Margin Stack78% CMCheck that inventory sourcing, packaging, shipping, and payment fees still leave about 78% contribution margin in Year 1, because every point lost pushes break-even out.
4Payroll Ramp$222.5KFund the Year 1 wage load of $222,500 for the founder, e-commerce manager, content creator, and warehouse lead, because hiring before sales mature can break the plan.
5Cash Cushion$584KHold at least $584,000 cash on hand because the model bottoms out in Month 25 and does not break even until Month 26.
6Launch Test25 unitsSet the return policy and prove the 25-unit pick-and-pack flow before paid traffic starts, because early storage or fulfillment mistakes get expensive fast.