Hi All! So I have never been involved in the posting or answering of questions, but I felt like this would be my best bet

My wedding is not until November, but I am super planner who likes everything thought of and basically planned in advance. I am going to get my hair done with my stylist who always does my hair. I do not care what the bridesmaids do with their hair, but wanted to let them know they can also get theirs done where I am going to get mine. If I offer this do I have to pay for them as well? Or since I am just offering to make them an appointment with mine, will they know they have to pay? No idea what the ettiquette is here.
Thanks!!!