W.M.
Help your daughter find her own place. If you can afford to help her, put down the deposit and pay the 1st months rent or more, whatever you can afford. Tell her to get a roommate. Roommates are easy to find especially if she has several friends. don't worry about when the baby comes just yet, she needs a job for income AND for insurance. Get her on state insurance if she can get it just till the baby is born. once baby is born she can get child support to help her. Get her a cheap rental house or 1 bdrm studio if she does not think she can find a roommate. Studio apts and houses are usually cheaper than an apt complex. There are also apts that are based on income, just find a safe one. Do not move her in with you if you do not have space or think it might ruin your relationship. Of course, don't choose boyfriend over daughter, help your daughter to take care of herself. She got pregnant irresponsibly and she needs to now be responsible. don't let her get used to you helping her or saving her, it is time she takes care of herself AND this new baby. If you had this apt on your own, maybe now that you have help with the rent from your boyfriend, you can afford to help her out a bit to get her started on her own. That way she won't be scared either. don't just give her money every month, she will take advantage or get used to it. Tell her you will pay the 1st 1-3 months in advance and when that is up, that is it. She MUST find a job. Also, you have to know that most likely this boyfriend will come back and then either he lives off of her free rent or she leaves the apt to get back with him and your money is wasted.....
Think with your head, not your heart...