With respect to liens/judgents - first in time is first in right. However, the IRS can take your house, ira, life insurance, social security etc. state law is different state to state. Some states have criminal penalties. check with someone in MO about that. IRS has various administrative avenues you can use to try and resolve the taxes - there is always bankruptcy for income tax -
you need a real estate attorney from your state. you have rights under state law
Get an attorney to represent you (or you as a group); perhaps request the court change the trustee?