For us, our tenant got a $250k compensation check for a distressing family matter and simply wanted somewhere to relocate to as he worked on those issues.

Most lenders don’t consider manufactured or mobile homes real property and there are lots of requirements and stipulations a buyer has to meet to qualify for a mortgage.  

Express your want to learn and help with their tasks in a clear and concise manner.Remember, building relationships takes time, and finding the right mentor may require persistence.

Again, you will likely need a key principle to co-sign your loan (typical financial requirements are 10% of loan balance in liquid assets and 1:1 net worth to loan balance), but Fannie and Freddie are both well versed in lending to LLCs where the GP has minimal capital personally invested in the deal.  

As for how to gauge fair value that's easy and never requires comp's, because revenues is what matters to you right?

Some require me as the investor to start the process with my own funds and others provide 20% up-front.

I also don't know if changing the insurance policy would also require me to loose the homestead exemption and DV discount on the property taxes. 

I would only buy a personal vacation/STR property if it was within driving distance such that you could use it for the weekend many times a year. if it involved flying, I would simply buy an STR for investment purposes and then vacation wherever we wanted.

It is true that you may miss out on this home, if sold this week, but also consider the Joy Of Missing Out (JOMO) by not overpaying for this property and also footing the bill for many of the potential repairs required for a 120+ year old home as mentioned above by the previous commentors.I would encourage you to take a contractor with you to the open house or someone with experience in this age of home to give you some insight into the property and what may need to be addressed in the first few years of ownership. 

Or if the lender requires that she be on the deed then you just meed to make sure that the client goes on deed as a tenant in common to as much as they sold.