JV deals with authorities in this space.
Many come to mind, including Savina Atai + Laura Doyle.
Search Amazon for books related to this topic or membership sites with massive numbers of members paying monthly.
Then do a JV deal with these people.
You can also use Direct Mail (far better than Digital Marketing for this topic), using SRDS or any large postcard/newsletter publisher managing large lists.
The best way to find any type of client is to target them with content on social media. Do this by creating content that speaks to the needs desires and fears of your audience. Your content can be in the form of video, images and live sessions.
Face Book groups are also a great place to find clients. Make sure to provide valuable information instead of selling them. When you provide value they will come to you for your services.
Make sure that you have your systems in place to receive the clients once you target them. A tree is an absolute must. You can get a free tree that you can brand to your business at https://eztree.me
My profile says care homes however I'm also a social media marketer and I can most definitely help you in this area. Set up a call with me.