I love how passionate Kristina is about her business! It sounds like she has some loyal customers and cares about her employees.
Nowadays, social media offers endless possibilities for businesses. I would recommend her taking a step to add revenue by creating online live courses to assist her customers with learning how to do some of their beauty care at home. First, she would share some basic secrets for free to hook them in, then ask them to join her live each week to learn something new (maybe just 30 minutes each time). This way her clients still continue their relationship with her and she can also grow her reach to outside her local area by asking them to share with others. These don't have to be perfect. That's the beauty of it! They should be professional, but still fun to bring out the personality that her clients have grown to loyal to and love.
I am always happy to help women entrepreneurs. Kristina, if you are interested, please reach out for some tips. Good luck!