Fannie Mae's Homestyle will allow structural renovations to be paid when completed. 

If they want out of it, you should have a termination clause that allows them to leave but compensates you for the losses or potential losses.

likely wont be allowed to  re use  appraisal ...your best bet to have a chance doing this will be to  work with same lender that just completed the  refinance …...in general  appraisals are  valid for 120 days

This will allow him to give you a better picture of steps to take to limit your tax exposure.

@John Mainwaring The Lake County Recorders office will allow you access but you have to pay for a one day access, they don't offer it for free.

Take photos of the inside if possible, show that it is inhumane and maybe talk to the town about what you're allowed to do.

When I bought my first property the previous owner allowed cats.

I would argue that your duty as a human being at this time is to the children there and not the mother, and if you allow the situation to go on you're enabling an obviously unfit mother.

However I still am paying around $1000 for "rent" but as my equity builds, I look forward to getting a home equity loan in a year.I advise finding a home that has the potential to build a granny flat or ADU in the back.I plan on building a separate unit in the back, which will allow me to have cash flow! 

No idea, but I'll tell you this, I recently requested of my lender that they allow me to move my duplex from my name into my LLC.