Link to Fannie Mae "Due on Sale" exemptions with transfer to:a limited liability company (LLC), provided that the mortgage loan was purchased or securitized by Fannie Mae on or after June 1, 2016, and the LLC is controlled by the original borrower or the original borrower owns a majority interest in the LLC, and if the transfer results in a permitted change of occupancy type to an investment property, such change does not violate the security instrument (for example, the 12 month occupancy requirement for a principal residence).Here is the link: https://www.fanniemae.com/cont...

Here is a link ( https://www.fanniemae.com/content/guide/servicing/d1/4.1/02.html) to Fannie Mae exemptions to "Due on Sale" clause that includes the following: transfer to a limited liability company (LLC), provided that: -the mortgage loan was purchased or securitized by Fannie Mae on or after June 1, 2016, and -the LLC is controlled by the original borrower or the original borrower owns a majority interest in the LLC, and if the transfer results in a permitted change of occupancy type to an investment property, such change does not violate the security instrument (for example, the 12 month occupancy requirement for a principal residence). 

Also looking for: deed restrictions, tax exemptions that could affect the property later. 

She proceeded to tell me that her daughter will not be living in the house anymore because she had to withdraw from the university due to “serious medical issues”.

As for the second time, the tenant had a medical issue which caused her to fall behind. 

If one of your workers (including your friend) get injured on your jobsite you could be liable for their medical costs and disability.

I use the following right now:REIT: Vanguard Real Estate Index Fund (VGSLX)Bond fund: Vanguard Pennsylvania Long Term Tax Exempt Fund (VPAIS)Fund prices will fluctuate with the market. 

My agent says I could switch my primary occupancy to Providence, and my wife can keeps hers as our home in NY so we keep the tax exemption there.

Did you ever file a Homestead exemption or did you originally have an owner occupied loan ?

Generally speaking, in my friend's state a primary residence property is exempt from property taxes due to the owner being a disabled veteran.