The term U.S. Real Property interest means an interest in real property (including an interest in a mine, well, or other natural deposit) located in the United States or the U.S. Virgin Islands, as well as certain personal property that is associated with the use of real property (such as farming machinery).
Ketosis is an eating plan where the body uses ketones to fuel the brain and body instead of glucose like most people use when on the SAD (standard American diet). It can be very helpful for blood sugar and consistent energy because fat is a very stable source of fuel.
I would say that most people would have to eat less than 20 gram carbs per day to reach ketosis. Personally I think it's a good idea for most people to eat 50-100 gram protein, maybe in the lower half of the interval if you want to be in ketosis. Eating the correct amount of fat is the easiest part.