Leeds has one of the strongest independent retail scenes in the north, from the arcades and the Corn Exchange to makers selling online from a small unit on the edge of the city. Many of those shops started on Instagram or at markets and now have a list of a few thousand people that hears from them occasionally, usually when there is a sale.
That list is often the cheapest revenue the shop has, and it is rarely looked after. A freelancer is the right size for the job: one person, a monthly fee, and the work happening inside your own account where you can see it.