I think you should choose option 1. I was kind of in the same position. I bought a house for me and my daughter and as much as I love my bf, he’s not allowed to live with us yet! I feel I needed to do it on my own for financial and emotional reasons, but the number one reason was for my daughter. She had enough to deal with not living with her daddy anymore. I didnt feel it was right she have to deal with living with someone else as well. Trust your gut. Plus the other options sound super messy!