E.g. my sister and BIL work in Silicon Valley and (like everyone else) complain about housing prices in Mountain View.

Owner's sister used to live a few blocks away but moved to Cincy. 

My sister owns a rental property in Brandon, FL with her ex-husband.

He was a lovely man, but a real slob, and I am trying to buy his house from his next of kin, a brother & sister who are not as eager to sell as we had hoped.

Credit was not great, but there are two couples living there (sisters and their significant others).

Account ClosedI have a sister, who has home in Cupertino, and works for Google.

My sister said this was a great opportunity to learn.. 

Suddenly I had enough money to pay my bills, with a cushion to spare, and—at the urging of my sister, who had been interested in real estate for a while—I came up with the audacious plan to buy my condo from my dad.I had been a homemaker for many years before becoming a professional author, and had relied on my husband to take care of all financial aspects of our marriage.

My older sister is already wants to get involved and she's a stay at home mom, so this was a section of the business I was considering having her learn.

I have heard advice that it shouldn't matter if it is your brother, sister, someone you trust implicitly verbal agreements are easy to get out of and when money is on the line and being risked agreements should be in black and white.