Using this honestly
Everything downstream of "projected visits" is arithmetic; the projection itself is the assumption — so model conservatively and let results replace assumptions. Nobody can promise a ranking or a traffic number, and a provider who guarantees one is telling you something about themselves. What can be verified monthly: whether visits, enquiries and customers from search are actually rising against the baseline.
The most useful output is often the smallest: break-even customers. If £495 per month needs 1–2 extra customers to pay for itself, you can judge that against your own sense of what better visibility would bring — a far more honest conversation than any projected revenue figure.