Well that depends on how hands-on you want to be!
For $30/mo I will keep your site online, up to date and functional. But you will be responsible for the content on the site. I will teach you how to use it, and will always be available for guidance, or to fix it when things break.
Custom email is a gsuite account on your domain, for an additional $5/mo
For $50/mo I will post new pages and blog posts / articles to your website on your behalf, but you will be responsible for providing the content. Simply email me photos and a blurb and it goes online! The limit on this is 2 pages/week, after which it gets added to your bill at a rate of $5/per page.
For $100 – $150/mo I will take complete control over your site, allowing you to just dictate what you want done via email, and I will make it happen for you. Price is variable based on amount of changes necessary per month.