OP, IMO, you need a complete physical (including psychiatric) exam and serious therapy before you make any decisions regarding a divorce. Your posts here are not completely logical or rational.. You have unrealistic expectations. I suspect you are regretting your early marriage and your loss of the lifestyle that is now promoted for 20somethings. I am also concerned that you may have a physical condition that is affecting your thought processes. After therapy, you are likely to have a better idea of what you need to do; then you will know what to do legally. If you are really so unhappy with your situation, you would be willing to walk with just the clothes on your back and not be worrying about a house you cannot afford.
Not to be mean - just realistic, what you you do if you no longer had your daughter? Your concerns seem to center on what she might want. Are you missing that she is becoming less dependent on you? What if ...? Please do not make such a life changing decision in haste. Certainly consult and attorney, but also see your physician to see if there is a phyusical reason for your mid-life crisis..