My 25 year old, college educated daughter lives with me. We have the space, she has a good job and is saving money, she owns her own car, she pays me rent, and she is saving her money for a down payment on a house. The longer she stays here, the less debt she will have to assume when she gets her own place. I have no problem with it.
Statistically she's at her peak value on the dating scene. It's all downhill from here. She should marry soon or she will probably marry less. Many women think because of their increasing beauty from age 15 to 25 things will only get better, but that's not how it works.
Neither of my sons are living with us. But if they needed to, I would not mind helping them out.