OK, leaving aside the house purchase idea for the minute, I'm still concerned about your situation. You are 27, living at home, with a decent but not exceptional income from work. You seem stressed to the max (see: title to this thread) about problems in your family, and you appear to have already given about $4,000 to your family to help with their problems (see: start of this thread and the amounts by which your savings are down). You are apparently being told it is your responsibility to provide housing for an undefined period for one or more family members.
Unless one or more of these family members is your own child, you have no legal obligation to do anything more for them. You may feel a familial wish to do something for them. But please remember:
1. Put on your own lifejacket first. This means not allowing anything to get in the way of your retirement savings. Please go back to maxing out your 401k for the year, and if possible maxing out your Roth as well. Those tax-free opportunities to save are limited and will not come back if you waste them.
2. Don't do anything more for your family members than they are doing for themselves. If they are making foolish choices when better options are open to them, do not subsidize those choices. Help them help themselves into a better place rather than becoming your dependents.
3. Do not become your family's sacrificial lamb. Make sure that everyone in the family is contributing equally (or according to their means) to the family members who are in need. If you provide the help when others who could help do not, you are setting yourself up to be expected to be the one who helps other family members financially for the rest of your life.
4. I see that you give 10% of your income in tithes. Consider either redirecting your tithes to the family members who need help, rather than taking it out of your retirement savings, or see whether your church can provide help directly to your family members - it is what it is there for.
5. Don't put your own life on hold because of your family member's problems. Don't let them get in the way of your work, your exercising, your friends and hobbies and social life.
Sorry if that all sounds like nagging. It's a compilation of things I've learnt here and in life. Good luck.