But I am getting single mothers who are wanting to rent , BUT when they realize they have to cut the grass or pay a landscape company they dont want it . 

Even if your sister is his mother, giving up a 2.75% interest rate, giving away 250k of his equity to pay off someone else's debts (even a family member), then having to downsize but have approx the same mortgage payment doesn't sound fair to him at all. 

I have a friend that I just taught amortization to as he is trying to quickly pay off his mother's FHA loan to remove a co-signer, then cash out refi (yes, I explained interest rates right now).

There are quite a few houses here that have mother in law suites, or basements that would be easy to convert.

I recently inherited my mother's house, and I'm excited to kick off my real estate journey with it as a tribute to her.

I have seen some decent lots sizes as well to add in an ADU or Carriage Home/mother in law suite. 

I feel stuck in a similar situation, I have $1M in equity in this house that I’m living in and renting the mother in law apt next to it , the problem of course is the 7-8% interest rates , have they not stopped the BRRRR technique in its tracks ?

They took our family home threw us on the street when they hospital took our mother( unnecessary surgery took her life.the said they would help with transfer of title but we didn’t know it was fully paid threw her mortgage life insurance!

I used to live in the SF Bay Area, and my mother still lives in nearby Fremont.

I had a mother of a college student call complaining because we told her the house was cable ready (meaning there were cable lines already installed-and trust me, we explained to the daughter what utilities were included in the price and what wasn't) and she was very distraught when she connected the line to her tv and got static.