I work inside your existing email platform, on a monthly basis, with one month's notice either way. You get a short written summary each month saying what changed, what it earned and what I am doing next.
It starts with a free audit: send a shop URL, I go through the account by hand and write up what is leaking and what I would do first, in the order I would do it. That takes five working days and costs nothing. The shape of the ongoing work is on the services page, and what it costs is on the pricing page.