My daughter wants to move back home with her baby?

My daughter lives in a different state. She is 26 and she has a 5 month old baby. She is currently living with a friend right now as her boyfriend and her do not get along. She has never worked steadily. She is always asking me for money and now she wants to move in. I love her and the baby but I also don't want them living with me. I am 54 and my 22 year daughter is moving to an apartment of her own in 1 week. Now my other daughter wants to move in and I was looking forward to peace and my time as both daughters have caused me a lot of heartache and the DRAMA! My husband, their step-father has had enough. We have never lived alone. I am tired of taking care of everyone else. I am torn as what to do, give up my life and move out so my daughters can be happy living with me and I can be miserable for the rest of my life without my husband? Or let her move in so we can fight and I can be broke? I know I will be the babysitter and the taxi. I just don't have the energy after working a full time job and I also have health issues. I know it will take her a good 2 years to work, get a car and save money to move out. Please give me your opinion as what you think would be best or what you would do as I can't even think anymore.