You might want to try : https://propertyhub.net/forum/ which is UK based- or better yet- consult with a local real estate attorney.  

Many times, title companies will have an attorney on staff you can consult with if you're a client.

I'd consult a real estate attorney to ask if this would even be possible.  

There isn't much in the way of tax strategies as far as I know, but consult a CPA before you move forward so you know.

Used paperwork from a consultant which charged the seller $3500 for his mediation.

You would definitely want to engage a tax attorney to consult on that topic.  

I would consult a local lawyer to make sure that you are following the correct steps to have them evicted.

you can always  try to  refinance  the loan and  get a regaular  loan to payoff the prinvate lender .... definitely  consult  with the  real estate attorney to  see  if  a  refinance  an paying it off is even a posisbility .

I just received a pre-approval from them but they are asking for 15% consulting fee and also that moving forward with the pre-approval might result in multiple inquiries on your credit report.

@Abigail SchuelerI think you should consult an attorney to understand the rules and regulations so that you can abide by those rules and regulations.Its always safe and good to follow the the rules and regulations.Good Luck!