The reason I build websites powered by WordPress for churches and non-profits is to facilitate website maintenance. In most cases, your own staff or volunteers will be able to add new pages and to update information on existing pages. In those infrequent cases where more technical knowledge is required, I will maintain and update your site based on an hourly rate of $50 with a half hour minimum charge. A monthly fee or retainer is not necessary for most churches and non-profit organizations.
If you have an existing website that meets your needs and you are looking for maintenance only, I will be happy to give you a quotation. Depending on the platform used to build your site and on the number of text and/or picture changes per month, the cost will vary considerably.